15 Best Car Roof Cargo Boxes for Extra Storage in 2027

Car roof cargo boxes add room for trips, but the right choice depends on how much storage you need, how often you’ll use it, and whether you prefer a rigid shell or a flexible bag. I name the Thule Force 3 XL my best overall pick for shoppers seeking a hard-shell option, while the SportRack Vista XL stands out for rear access and the Sailnovo 20-Cubic-Foot Carrier Bag for flexible soft-sided storage. Hard boxes offer a more structured, lockable setup but take up more room when stored; soft carriers pack away more easily but need careful attachment and weatherproofing. Vehicle fit, roof-rack limits, opening direction, and cargo capacity can matter as much as the headline volume. Read on for the full breakdown and help matching a box or bag to your vehicle and travel style.

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Key Takeaways

• The lineup divides into hard shells and soft carriers: the hard-shell models prioritize structure and lockable storage, while the 20- and 21-cubic-foot bags favor flexible packing and easier off-season storage.
• Capacity figures alone do not settle the choice: the 11- to 14-cubic-foot boxes may suit smaller loads better than a larger carrier if your roof, rack, or vehicle shape limits what you can safely carry.
• Access is a meaningful differentiator: the SportRack Vista XL’s rear-opening design may work better when side access is blocked by a wall, another vehicle, or a narrow parking space.
• Thule’s two models serve different priorities: the Force 3 XL is the broad hard-shell pick, while the Pulse 2 M offers a smaller 14-cubic-foot format with dual-side opening.
• Several choices share similar stated capacity: the Asinking, MIDABAO, and FIVKLEMNZ soft carriers cluster around 20 to 21 cubic feet, so buyers should compare fit, fastening approach, and storage habits rather than volume alone.

Our Top Car Roof Cargo Boxes Picks

PM PERFORMOTOR Hard-Shell Rooftop Cargo Box, 13 cu. ft.		Best Compact Hard-Shell Pick	Capacity: 13 cubic feet	Dimensions: 56.3 × 36.8 × 16.25 in	Maximum load: 110 lbs, evenly distributed	VIEW LATEST PRICE	See Our Full Breakdown
Sailnovo 20-Cubic-Foot Rooftop Cargo Carrier Bag		Best Foldable Value Pick	Capacity: 20 cubic feet	Dimensions: 51 × 39 × 17 in	Weight: 8.3 lbs	VIEW LATEST PRICE	See Our Full Breakdown
Thule Force 3 XL Rooftop Cargo Box		Best Premium Hard-Shell Pick	Volume: 18 cubic feet	Dimensions: 89 × 18 × 40 in	Weight: 65 lbs	VIEW LATEST PRICE	See Our Full Breakdown
SportRack Vista XL Rear-Opening Cargo Box, Black		Best Rear-Opening Pick	Capacity: 18 cubic feet (510 L)	Dimensions: 63 × 38 × 19 in	Maximum weight capacity: 100 lbs (45 kg)	VIEW LATEST PRICE	See Our Full Breakdown
Asinking Waterproof Rooftop Cargo Carrier Bag, 20 cu ft		Best Soft Carrier for Rack-Free Setups	Capacity: 20 cubic feet	Dimensions: 40 × 52 in	Material: 900D double-coated PVC laminated tarpaulin	VIEW LATEST PRICE	See Our Full Breakdown
Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag		Best for Rack-Free Flexibility	Capacity: 21 cubic feet	Material: 840D PVC	Water resistance: Waterproof	VIEW LATEST PRICE	See Our Full Breakdown
DNA Motoring Universal Heavy-Duty Rooftop Cargo Carrier, 12.7 cu. ft.		Best Compact Hard-Shell Pick	Capacity: 12.7 cu. ft. / 360 L	Maximum load: 110 lb, evenly distributed	Dimensions: 55 x 34.5 x 14 in	VIEW LATEST PRICE	See Our Full Breakdown
DNA Motoring Lockable Rooftop Cargo Box, 11 Cubic Feet, Glossy Black		Best for Smaller Loads	Capacity: 11 cubic feet	Maximum load: 110 lb, evenly distributed	Dimensions: 53 x 34 x 15 in	VIEW LATEST PRICE	See Our Full Breakdown
MIDABAO 20-Cubic-Foot Waterproof Car Roof Cargo Carrier		Best for Stowable High Capacity	Capacity: 20 cubic feet	Dimensions: 51.1 x 39 x 17 in	Weight: 3.94 kg	VIEW LATEST PRICE	See Our Full Breakdown
FIVKLEMNZ 21-Cubic-Foot Waterproof Soft Rooftop Cargo Carrier		Best for Weather-Focused Soft Storage	Capacity: 21 cubic feet	Dimensions: 52 x 40 x 17 in	Weight: 4.68 kg	VIEW LATEST PRICE	See Our Full Breakdown
D SOLUTIONS Hard Shell Rooftop Cargo Carrier, 11 Cubic Feet		Best Compact Hard-Shell Pick	Capacity: 11 cubic feet	Load capacity: 110 lbs	Dimensions: 53 x 34 x 15 inches	VIEW LATEST PRICE	See Our Full Breakdown
Maxsa Innovations 21 cu ft Hard-Shell Rooftop Cargo Box		Best for Maximum Capacity	Capacity: 21 cu ft	Weight capacity: 165 lbs	Dimensions: 68.11 × 31.89 × 14.57 in	VIEW LATEST PRICE	See Our Full Breakdown
Thule Pulse 2 M Roof-Mounted Cargo Box, 14 Cu. Ft., Dual-Side Opening		Best for Convenient Mounting	Volume: 400 liters (14 cu. ft.)	Load capacity: 75 kg	Opening: Dual-side	VIEW LATEST PRICE	See Our Full Breakdown
DNA MOTORING Lockable Rooftop Cargo Box, 11 cu. ft., Textured Black		Best for Simple, Lockable Storage	Capacity: 11 cubic feet	Maximum load: 110 lb, evenly distributed	Dimensions: 53 × 34 × 15 in	VIEW LATEST PRICE	See Our Full Breakdown
Maxsa Innovations Hard-Shell Rooftop Cargo Box, 17 cu ft, 165 lb Capacity		Best Mid-Size Capacity	Capacity: 17 cu ft	Weight capacity: 165 lbs	Dimensions: 68.11 x 32.68 x 15.35 inches	VIEW LATEST PRICE	See Our Full Breakdown

More Details on Our Top Picks

1. PM PERFORMOTOR Hard-Shell Rooftop Cargo Box, 13 cu. ft.

   

   Best Compact Hard-Shell Pick

   View Latest Price

   I’d choose the PM PERFORMOTOR when a rigid, lockable box matters more than maximum volume. Its 13 cubic feet is less than the 18 cubic feet offered by the SportRack Vista XL or Thule Force 3 XL, but the smaller footprint may suit buyers who want to keep a lower profile on the roof and carry a moderate load. The dual-sided opening also gives more flexibility when parking beside traffic or loading from a particular side. Its ABS shell is listed as waterproof and impact-resistant, while the included brackets and keys make the package ready for crossbar mounting. The tradeoff is a firm fit requirement: this box needs crossbars, and its 110-pound maximum load calls for attention to evenly distributed weight. I’d skip it for bulky family loads that need more capacity.

   Pros:

   • Rigid ABS shell is described as waterproof and impact-resistant.
   • Dual-sided opening makes loading easier from either side of the vehicle.
   • Locking system, keys, and four mounting brackets are included.
   • 110-pound maximum load is higher than the SportRack Vista XL’s stated 100-pound limit.

   Cons:

   • Requires factory or aftermarket crossbars.
   • Offers less storage than the 18-cubic-foot SportRack Vista XL and Thule Force 3 XL.
   • The 110-pound load limit requires cargo to be distributed evenly.

   Best for: Drivers with crossbars who want a lockable hard-shell box for moderate luggage and value access from either side.

   Not ideal for: Families hauling bulky camping gear or vehicles without crossbars; the 13-cubic-foot capacity is limited, and this box requires a roof rack.

   • Capacity:13 cubic feet
   • Dimensions:56.3 × 36.8 × 16.25 in
   • Maximum load:110 lbs, evenly distributed
   • Material:Impact-resistant ABS plastic
   • Water resistance:Waterproof
   • Mounting:Roof mount; requires crossbars
   • Opening:Dual-sided
   • Included components:Cargo box, 4 mounting brackets, pair of keys
   Our verdict

   “Choose this compact hard-shell box if you have crossbars and prefer dual-side access and a locking lid over the larger capacity of the SportRack Vista XL.”

   → See it on Amazon →

2. Sailnovo 20-Cubic-Foot Rooftop Cargo Carrier Bag

   

   Best Foldable Value Pick

   View Latest Price

   The Sailnovo 20-cubic-foot bag makes sense for buyers who need substantial trip capacity but don’t want a hard box taking up garage space between outings. At 8.3 pounds, it is much lighter and easier to store than the 65-pound Thule Force 3 XL, and its foldable design suits occasional use. The 1000D Oxford cloth, reinforced seams, and water-repellent coating add protection, but this is a water-resistant fabric carrier, not the same kind of rigid enclosure as the Thule or the waterproof PM PERFORMOTOR box. Its mounting options are also vehicle-dependent: it can attach to suitable racks or exposed metal door frames, and the listed minimum crossbar spacing is 53 inches. I’d favor it for flexible storage, but not for buyers seeking a hard shell or guaranteed rack-free fit on every vehicle.

   Pros:

   • 20 cubic feet of capacity for luggage and camping gear.
   • Folds for compact storage and weighs 8.3 pounds.
   • 1000D Oxford cloth, reinforced seams, and a water-repellent coating.
   • Includes extra luggage straps, door hooks, and a storage bag.

   Cons:

   • Water resistant rather than specified as waterproof like the Asinking bag.
   • Rack-free installation requires exposed metal door frames; it is not recommended for sunroof vehicles without a roof basket.
   • Requires at least 53 inches of crossbar spacing when mounted on crossbars.

   Best for: Occasional road trippers and campers who want 20 cubic feet of soft storage that folds away after a trip.

   Not ideal for: Drivers who need a rigid, lockable enclosure, stronger rain protection, or a rack-free installation without exposed metal door frames.

   • Capacity:20 cubic feet
   • Dimensions:51 × 39 × 17 in
   • Weight:8.3 lbs
   • Material:1000D Oxford cloth
   • Water resistance:Water resistant
   • Mounting:Straps; compatible with crossbars, side rails, roof baskets, or exposed metal door frames
   • Minimum crossbar spacing:53 in
   • Warranty:1 year
   Our verdict

   “Pick the Sailnovo if you want a foldable 20-cubic-foot carrier for occasional trips and can match its mounting requirements to your vehicle.”

   → See it on Amazon →

3. Thule Force 3 XL Rooftop Cargo Box

   

   Best Premium Hard-Shell Pick

   View Latest Price

   I’d put the Thule Force 3 XL near the front for buyers who want an everyday-use hard box with clear signals during mounting and closing. Its 18-cubic-foot capacity matches the SportRack Vista XL, but the Thule opens from both sides rather than only from the rear, which can make loading more practical when the vehicle is parked in a tight space. The mounting system indicates when the box is secured, and SlideLock signals when the lid is closed and locked—useful feedback when a rushed departure makes a missed latch more likely. It is water resistant, not described as waterproof, and its 65-pound weight is a real handling drawback compared with the 8.3-pound Sailnovo bag. I’d choose it for a sturdy, feature-led setup, but its weight and listed 40-inch width deserve a careful fit check.

   Pros:

   • 18 cubic feet of rigid storage with access from both sides.
   • Mounting system indicates when the box is securely attached.
   • SlideLock system locks the lid and signals when it is closed.
   • Limited lifetime warranty is listed.

   Cons:

   • 65-pound weight makes lifting and installation more demanding than handling a soft bag such as the Sailnovo.
   • Listed as water resistant rather than waterproof.
   • At 40 inches wide, it may be a poor fit for some vehicle roofs or parking setups.

   Best for: Frequent travelers who have compatible roof bars and want an 18-cubic-foot hard box with dual-side access and visible mounting and locking cues.

   Not ideal for: Drivers who need a lightweight carrier, a stated waterproof rating, or a narrow roof fit; the box weighs 65 pounds and measures 40 inches wide.

   • Volume:18 cubic feet
   • Dimensions:89 × 18 × 40 in
   • Weight:65 lbs
   • Material:Plastic
   • Water resistance:Water resistant
   • Mounting:Roof mount
   • Opening:Access from both sides
   • Warranty:Limited lifetime
   Our verdict

   “Choose the Thule Force 3 XL if you want a feature-rich 18-cubic-foot hard box and can manage its weight and confirm the broad dimensions fit your vehicle.”

   → See it on Amazon →

4. SportRack Vista XL Rear-Opening Cargo Box, Black

   

   Best Rear-Opening Pick

   View Latest Price

   The SportRack Vista XL is the clearest choice here for buyers who want to load from the back of the vehicle rather than reach across a roof-side lid. Its rear-opening design keeps access at the tail end, while 18 cubic feet gives it the same stated capacity as the Thule Force 3 XL. The distinction is in the setup: SportRack includes tool-free mounting hardware and lists compatibility with its own systems, square and round bars, and most factory racks, but buyers still need to check bar spacing and vehicle fit. Its UV-resistant ABS shell offers a rigid alternative to the soft Sailnovo and Asinking bags. The tradeoffs are a 100-pound maximum load—10 pounds below the PM PERFORMOTOR—and access limited to the rear. I’d skip it if rear access is blocked by a garage or tight parking space.

   Pros:

   • 18 cubic feet of rigid storage, matching the listed capacity of the Thule Force 3 XL.
   • Rear opening provides access at the back of the vehicle.
   • Tool-free mounting hardware simplifies installation and removal.
   • UV-resistant ABS plastic with a key and lock included.

   Cons:

   • 100-pound maximum load is lower than the PM PERFORMOTOR’s 110-pound limit.
   • Rear-only opening can be awkward when the back of the vehicle is obstructed.
   • Rack fit and crossbar spacing need to be checked before purchase.

   Best for: Drivers with compatible crossbars who prefer rear access and want a rigid 18-cubic-foot box with tool-free mounting hardware.

   Not ideal for: Drivers who need access from either side, carry more than 100 pounds in the box, or cannot verify compatibility with their rack and crossbar spacing.

   • Capacity:18 cubic feet (510 L)
   • Dimensions:63 × 38 × 19 in
   • Maximum weight capacity:100 lbs (45 kg)
   • Material:UV-resistant ABS plastic
   • Opening:Rear
   • Crossbar spacing:23 5/8–29 3/4 in
   • Mounting:Tool-free; fits SportRack systems, square bars, round bars, and most factory racks
   • Warranty:25 years
   Our verdict

   “Choose the Vista XL if rear access and tool-free mounting matter more to you than the dual-side loading offered by the Thule Force 3 XL.”

   → See it on Amazon →

5. Asinking Waterproof Rooftop Cargo Carrier Bag, 20 cu ft

   

   Best Soft Carrier for Rack-Free Setups

   View Latest Price

   For drivers without roof bars, the Asinking 20-cubic-foot bag is the most directly suited option in this group: it is listed for vehicles with or without roof racks and includes door hooks, a non-slip mat, and a combination lock. Its double-coated PVC tarpaulin, heat-welded seams, storm-flap zipper, and IPX66 water-resistance specification give it a stronger weather-protection pitch than the water-resistant Sailnovo. Both offer 20 cubic feet, but the Asinking’s broader fit claim comes with a hands-on setup: straps and hooks still need to be secured to the vehicle. It also lacks the rigid shell of the PM PERFORMOTOR, so it won’t provide the same structured enclosure. The supplied data gives a two-year warranty but no long-term durability detail, so I’d treat it as a flexible trip carrier rather than a permanent roof fixture.

   Pros:

   • 20 cubic feet of capacity for family luggage and trip gear.
   • Listed to fit vehicles with or without roof racks.
   • Double-coated PVC tarpaulin, heat-welded seams, and a storm-flap zipper.
   • Includes a non-slip mat, four anti-scratch door hooks, a combination lock, and a storage bag.

   Cons:

   • Installation still requires securing straps and hooks to the vehicle.
   • Soft construction does not provide the rigid enclosure of the PM PERFORMOTOR hard-shell box.
   • Product details do not describe long-term durability in use.

   Best for: Travelers who need a large soft carrier for a vehicle without crossbars and want added rain protection and included door hooks.

   Not ideal for: Drivers who want a rigid, lockable hard-shell box or a carrier they can leave installed without checking straps and hooks.

   • Capacity:20 cubic feet
   • Dimensions:40 × 52 in
   • Material:900D double-coated PVC laminated tarpaulin
   • Water resistance:IPX66
   • Fit:Vehicles with or without roof racks
   • Included components:Non-slip mat, 4 anti-scratch door hooks, combination lock, storage bag, user manual
   • Seams and closure:Heat-welded seams and storm-flap zipper
   • Warranty:2 years
   Our verdict

   “Choose the Asinking if you need 20 cubic feet of soft storage on a vehicle without crossbars and prefer its stated weather protection over the Sailnovo’s foldable fabric design.”

   → See it on Amazon →

6. Asinking 21-Cubic-Foot Waterproof Rooftop Cargo Carrier Bag

   

   Best for Rack-Free Flexibility

   View Latest Price

   The Asinking makes the most sense for buyers who need 21 cubic feet of soft-sided space but do not have roof crossbars. Its listed fit includes vehicles with or without roof racks, and the included padded door hooks, extra straps, and anti-slip mat give more guidance for securing it than the MIDABAO bag’s description provides for rack-free mounting. The 840D PVC, welded seams, and protected waterproof zipper are aimed at keeping weather out, though a soft bag still offers less shape and impact protection than the rigid DNA Motoring 12.7-cubic-foot box. The tradeoff is hands-on installation: straps and door hooks need careful positioning and tightening, and flexible cargo can shift more than it would in a hard shell. Choose this for bulky, weather-exposed luggage when crossbar-free compatibility matters more than rigid protection.

   Pros:

   • 21-cubic-foot capacity accommodates bulky trip luggage
   • 840D PVC, welded seams, and a protected waterproof zipper are designed for wet conditions
   • Listed fit covers vehicles with or without roof racks
   • Includes an anti-slip mat, padded door hooks, extra straps, and a storage bag

   Cons:

   • Securing it takes more hands-on setup than mounting a hard-shell box to crossbars
   • Soft construction provides less impact protection and shape retention than a rigid carrier

   Best for: Drivers without roof crossbars who need high-volume storage for soft luggage and want included door hooks and securing accessories.

   Not ideal for: People carrying fragile gear or seeking quick, rigid, lockable storage; this soft bag requires strap setup and offers less structure than a hard-shell box.

   • Capacity:21 cubic feet
   • Material:840D PVC
   • Water resistance:Waterproof
   • Dimensions:52 x 40 x 18 in
   • Weight:4.24 kg
   • Fit:Universal; vehicles with or without roof racks
   • Closure:Zipper with protective flaps
   • Included accessories:Anti-slip mat, 6 padded door hooks, storage bag, 2 extra straps, luggage lock
   Our verdict

   “Choose the Asinking if you need a high-capacity soft carrier that can mount without roof racks and are willing to secure its straps carefully.”

   → See it on Amazon →

7. DNA Motoring Universal Heavy-Duty Rooftop Cargo Carrier, 12.7 cu. ft.

   

   Best Compact Hard-Shell Pick

   View Latest Price

   For buyers who prefer a rigid box but do not need the space of a 20- or 21-cubic-foot bag, this DNA Motoring model offers a more compact 12.7-cubic-foot ABS shell. Unlike the Asinking and FIVKLEMNZ soft carriers, it has a fixed shape that can shield packed items from some knocks and makes loading less dependent on arranging a flexible bag. Its side-opening lid, locking system, and included keys add practical access and basic cargo security, while the 110-pound evenly distributed load limit defines what belongs inside. The catch is fit: it mounts to crossbars only, so it is not an option for a vehicle without them. It is also water resistant rather than described as waterproof, making it a less suitable choice than the soft bags for buyers prioritizing explicitly waterproof construction.

   Pros:

   • Rigid, impact-resistant ABS construction gives cargo more structure than a soft bag
   • Side-opening lid provides access without opening the whole top
   • Locking system and keys are included
   • 110-pound evenly distributed load limit is specified

   Cons:

   • Requires vehicle crossbars for installation
   • 12.7 cubic feet offers less room than the soft carriers in this group
   • Described as water resistant, not waterproof

   Best for: Drivers with compatible roof crossbars who want a rigid, lockable carrier for a moderate load without the bulk of a 20-plus-cubic-foot bag.

   Not ideal for: Drivers without roof crossbars or those needing the maximum cargo volume; its 12.7-cubic-foot capacity is well below the Asinking and FIVKLEMNZ bags.

   • Capacity:12.7 cu. ft. / 360 L
   • Maximum load:110 lb, evenly distributed
   • Dimensions:55 x 34.5 x 14 in
   • Material:Impact-resistant ABS
   • Mounting:Rooftop crossbars only
   • Opening:Side opening
   • Water resistance:Water resistant
   • Included components:Cargo box, 4 ABS mounting brackets, pair of keys
   Our verdict

   “Pick this DNA Motoring box if your vehicle has crossbars and you value rigid, lockable storage over the larger capacity of a soft carrier.”

   → See it on Amazon →

8. DNA Motoring Lockable Rooftop Cargo Box, 11 Cubic Feet, Glossy Black

   

   Best for Smaller Loads

   View Latest Price

   This DNA Motoring box suits crossbar-equipped vehicles that need rigid, lockable storage for a smaller load, rather than the larger packing space offered by its 12.7-cubic-foot sibling. The difference is modest but useful when a more compact carrier better matches the trip: it measures 53 x 34 x 15 inches and holds 11 cubic feet. Like the larger DNA Motoring box, it uses an ABS shell and side-opening lid, with a lock and keys included; those features make it a more structured alternative to the MIDABAO soft bag, but do not make it waterproof—the listing says water resistant. It also shares the same 110-pound evenly distributed load ceiling. Crossbars are required, and buyers who regularly pack bulky gear may find the extra capacity of the 12.7-cubic-foot model more useful.

   Pros:

   • Compact 11-cubic-foot rigid storage for smaller loads
   • Impact-resistant ABS shell provides more structure than a soft carrier
   • Side-opening lid and included lock and keys
   • Mounting brackets and hardware are included

   Cons:

   • Requires vehicle crossbars
   • Smaller capacity than the DNA Motoring 12.7-cubic-foot box
   • Water resistance is specified, but waterproof construction is not

   Best for: Crossbar-equipped drivers who carry a modest amount of luggage and want a compact hard-shell box with a lock and side access.

   Not ideal for: Families packing bulky trip gear or drivers without crossbars; its 11-cubic-foot capacity is smaller than the other DNA Motoring hard-shell option and its mounting requires crossbars.

   • Capacity:11 cubic feet
   • Maximum load:110 lb, evenly distributed
   • Dimensions:53 x 34 x 15 in
   • Material:ABS plastic
   • Fit:Vehicles with crossbars
   • Water resistance:Water resistant
   • Opening:Side-opening lid
   • Included components:Cargo box, 4 ABS mounting brackets, pair of keys, mounting hardware
   Our verdict

   “Choose this compact DNA Motoring box for smaller loads if you have crossbars and want a rigid carrier with a lock.”

   → See it on Amazon →

9. MIDABAO 20-Cubic-Foot Waterproof Car Roof Cargo Carrier

   

   Best for Stowable High Capacity

   View Latest Price

   The MIDABAO is a practical match for buyers who want 20 cubic feet of flexible, waterproof storage that can be packed away when the trip is over. At 3.94 kg, it is lighter than the listed Asinking and FIVKLEMNZ bags, and its storage bag helps keep the carrier from taking up permanent garage space. It also fits vehicles with or without roof racks and comes with an anti-slip mat plus short and long straps. Compared with the Asinking, however, its description does not explain how the carrier attaches to vehicles without racks, so rack-free buyers may have less guidance about setup. The PVC-and-nylon soft construction is easier to store than a hard box, but offers less structure and protection than the DNA Motoring ABS carriers. Consider it for soft luggage, not fragile cargo.

   Pros:

   • 20-cubic-foot capacity for bulky luggage
   • Waterproof PVC-and-nylon construction
   • Fits vehicles with or without roof racks
   • Includes an anti-slip mat, multiple straps, and a storage bag

   Cons:

   • Soft-sided construction provides less structure and impact protection than a hard-shell box
   • The description does not specify how it attaches to vehicles without roof racks

   Best for: Travelers who need a large, pack-away carrier for soft luggage and want a listed fit for vehicles with or without roof racks.

   Not ideal for: Drivers carrying fragile items or anyone wanting clearly described rack-free attachment instructions; the flexible shell has less structure than a hard box, and the no-rack method is not specified.

   • Capacity:20 cubic feet
   • Dimensions:51.1 x 39 x 17 in
   • Weight:3.94 kg
   • Material:PVC and nylon
   • Water resistance:Waterproof
   • Fit:Universal; with or without roof racks
   • Closure:Zipper
   • Included components:Anti-slip mat, six short straps, two long straps, storage bag
   Our verdict

   “Choose the MIDABAO for high-volume soft luggage that can be stored compactly, but seek clearer mounting guidance if your vehicle lacks roof racks.”

   → See it on Amazon →

10. FIVKLEMNZ 21-Cubic-Foot Waterproof Soft Rooftop Cargo Carrier

    

    Best for Weather-Focused Soft Storage

    View Latest Price

    The FIVKLEMNZ is built for buyers who want a large soft carrier with several stated weather barriers: 840D PVC, welded seams, and a double-layer waterproof cover. Its 21-cubic-foot capacity matches the Asinking bag, and both list compatibility with vehicles that do not have roof racks. The FIVKLEMNZ also includes reinforced straps, six door hooks, an anti-slip mat, and a luggage lock, making it a well-equipped alternative to the MIDABAO, whose no-rack attachment method is not described. Those accessories still mean installation involves securing multiple points rather than simply mounting a box to crossbars. And, like the other soft bags, it cannot offer the rigid shape or cargo protection of the DNA Motoring hard-shell carriers. Its listed dimensions are one inch shorter in height than the Asinking, a small distinction rather than a meaningful capacity advantage.

    Pros:

    • 21-cubic-foot capacity for bulky trip loads
    • 840D PVC, welded seams, and a double-layer waterproof cover
    • Listed fit includes vehicles with or without a roof rack
    • Includes reinforced straps, six door hooks, anti-slip mat, luggage lock, and storage bag

    Cons:

    • Soft-sided design offers less protection and structure than a hard-shell carrier
    • Installation requires securing multiple straps and door hooks

    Best for: Drivers who need 21 cubic feet of soft storage, want stated waterproof construction, and need mounting accessories for a vehicle with or without roof racks.

    Not ideal for: People transporting fragile cargo or seeking a quick-install rigid box; its soft sides provide less impact protection and require careful strap and door-hook setup.

    • Capacity:21 cubic feet
    • Dimensions:52 x 40 x 17 in
    • Weight:4.68 kg
    • Material:840D PVC; listed as Oxford cloth
    • Water resistance:Waterproof
    • Fit:Universal; vehicles with or without a roof rack
    • Included accessories:Anti-slip mat, reinforced straps, 6 door hooks, luggage lock, storage bag
    • Warranty:12 months
    Our verdict

    “Choose the FIVKLEMNZ if you want a highly equipped 21-cubic-foot soft carrier with stated waterproof construction and can handle a more involved tie-down setup.”

    → See it on Amazon →

11. D SOLUTIONS Hard Shell Rooftop Cargo Carrier, 11 Cubic Feet

    

    Best Compact Hard-Shell Pick

    View Latest Price

    I’d choose the D SOLUTIONS 11-cubic-foot box when the goal is to move occasional luggage off the seats without taking on a full-size cargo box. Its waterproof ABS shell, keyed lock, and stated 110-pound capacity give it a more protective setup than soft rooftop bags, while its 53-inch length is shorter than the Maxsa Innovations 21 cu ft box. That smaller footprint can suit buyers with less gear, though the listed dimensions still need to clear the vehicle’s roof and hatch.

    The tradeoff is limited capacity: this is a better fit for a few bags than bulky family-trip loads. It also requires crossbars, so it won’t suit a bare roof, and its 50.3-pound empty weight is substantial for an 11-cubic-foot box. I’d favor it over the similar-sized DNA MOTORING 11 cu ft when waterproof construction is a priority, but the available details don’t establish that the two share the same fit or opening mechanism.

    Pros:

    • Waterproof ABS shell helps protect stored gear from wet weather.
    • Keyed lock and included keys add a basic layer of security.
    • Compact 11-cubic-foot capacity keeps the box smaller than the 21-cubic-foot Maxsa option.
    • Includes mounting brackets and hardware.

    Cons:

    • Requires vehicle crossbars.
    • At 50.3 pounds empty, it is heavy relative to its capacity.
    • Its 11-cubic-foot volume may not suit bulky family luggage.

    Best for: Drivers with compatible crossbars who want weather-protected space for a few bags or smaller travel gear.

    Not ideal for: Families carrying bulky gear or drivers without crossbars; the 11-cubic-foot capacity is modest and crossbars are required.

    • Capacity:11 cubic feet
    • Load capacity:110 lbs
    • Dimensions:53 x 34 x 15 inches
    • Item weight:50.3 pounds
    • Material:ABS plastic
    • Water resistance:Waterproof
    • Mounting:Roof mount; requires crossbars
    • Included components:Cargo box, pair of keys, 4 mounting brackets, mounting hardware
    Our verdict

    “Choose this compact hard shell if you have crossbars and value weather protection over the greater capacity of the Maxsa Innovations 21 cu ft box.”

    → See it on Amazon →

12. Maxsa Innovations 21 cu ft Hard-Shell Rooftop Cargo Box

    

    Best for Maximum Capacity

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    For buyers who need to shift a large amount of luggage out of the cabin, I’d put the Maxsa Innovations 21 cu ft box ahead of the smaller D SOLUTIONS and DNA MOTORING 11-cubic-foot boxes. Its 21-cubic-foot volume and 165-pound weight capacity make it the high-capacity hard-shell choice in this group, and the dual-side opening lets a parked driver load from whichever side is accessible. The waterproof ABS shell and included lock and straps add useful protection and securing points for travel.

    That extra room comes with a longer 68.11-inch footprint, so roof fit and hatch clearance deserve attention before purchase. The 41.9-pound empty weight is also a two-person handling consideration, even though it is lighter than the D SOLUTIONS box. It needs a compatible roof rack, and the listed 30-day manufacturer warranty is limited compared with the Thule Pulse 2 M’s limited-lifetime warranty. I’d select it for volume, not for the longest stated warranty.

    Pros:

    • 21-cubic-foot capacity is the largest among these hard-shell picks.
    • Dual-side opening gives more flexibility when parking or loading.
    • Waterproof ABS shell and included locking system with two keys.
    • 165-pound stated weight capacity.

    Cons:

    • Requires a compatible roof rack.
    • The 68.11-inch length may create fit or hatch-clearance issues on some vehicles.
    • The stated manufacturer warranty is 30 days.

    Best for: Families or road-trippers with compatible roof racks who need space for multiple bags and want access from either side.

    Not ideal for: Buyers with short roofs, limited lifting help, or a preference for a longer stated warranty; the box is long, weighs 41.9 pounds empty, and lists a 30-day warranty.

    • Capacity:21 cu ft
    • Weight capacity:165 lbs
    • Dimensions:68.11 × 31.89 × 14.57 in
    • Item weight:41.9 lbs
    • Material:ABS
    • Opening:Dual-side
    • Fit:Universal; check roof rack compatibility
    • Warranty:30 days
    Our verdict

    “Pick this Maxsa when maximizing hard-shell storage matters more than a compact footprint or a longer stated warranty.”

    → See it on Amazon →

13. Thule Pulse 2 M Roof-Mounted Cargo Box, 14 Cu. Ft., Dual-Side Opening

    

    Best for Convenient Mounting

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    The Thule Pulse 2 M stands out for buyers who want a more guided mounting process rather than the greatest possible volume. Its tool-free system includes a torque indicator and closure confirmation, giving the installer clear cues about mounting and closing; that is a meaningful difference from the supplied details for the Maxsa Innovations boxes, which focus more on capacity and opening access. At 14 cubic feet, it also sits between the 11-cubic-foot D SOLUTIONS and the much larger 21-cubic-foot Maxsa.

    The dual-side opening helps when the vehicle is parked close to a wall or another car, while the weather-resistant ASA-ABS shell and forward positioning are intended to preserve trunk access. The tradeoff is less room than either Maxsa box, and the 75 kg load limit still has to be respected alongside the vehicle’s roof limits. It requires a roof-mounted setup, so it is not a solution for a car without compatible roof equipment. I’d choose it for mounting convenience and stated warranty coverage, not maximum capacity.

    Pros:

    • Tool-free mounting system includes a torque indicator and closure confirmation.
    • Dual-side opening improves access from either side of the vehicle.
    • Weather-resistant ASA-ABS shell.
    • Limited-lifetime warranty is longer in stated duration than the Maxsa 21 cu ft box’s 30-day warranty.

    Cons:

    • 14-cubic-foot volume is smaller than both Maxsa hard-shell options.
    • Requires a roof-mounted setup.
    • The 75 kg maximum load still needs to fit within the vehicle’s roof load limit.

    Best for: Drivers with compatible roof equipment who value guided, tool-free mounting, two-sided access, and a limited-lifetime warranty.

    Not ideal for: Travelers carrying bulky loads who need 17 or 21 cubic feet, or drivers without a compatible roof-mounted setup.

    • Volume:400 liters (14 cu. ft.)
    • Load capacity:75 kg
    • Opening:Dual-side
    • Material:ASA-ABS plastic
    • Mounting:Roof mount; tool-free system with torque indicator
    • Fit:Universal
    • Color:Black
    • Warranty:Limited lifetime
    Our verdict

    “Choose the Thule Pulse 2 M if guided mounting and two-sided access matter more to you than the larger capacity of either Maxsa box.”

    → See it on Amazon →

14. DNA MOTORING Lockable Rooftop Cargo Box, 11 cu. ft., Textured Black

    

    Best for Simple, Lockable Storage

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    I’d consider the DNA MOTORING 11 cu ft for a straightforward, lockable hard shell when the main aim is to add modest storage above the cabin. It shares the D SOLUTIONS box’s 11-cubic-foot capacity and 53 × 34 × 15-inch dimensions, so those two occupy a similar compact niche rather than competing with the larger Maxsa Innovations 17 cu ft. This DNA MOTORING model includes a keyed lock, mounting brackets, and hardware, and its side-opening lid stays open until closed—useful when loading without someone holding the lid.

    The key distinction is weather protection: this listing says the box is not water resistant, unlike the waterproof D SOLUTIONS and Maxsa boxes. That makes it a less suitable choice for gear that must stay dry in rain. It also requires crossbars and has a 110-pound maximum load that must be evenly distributed. I’d pick it for basic locked storage in fair conditions, but choose the D SOLUTIONS instead when weather resistance is a priority.

    Pros:

    • 11-cubic-foot capacity adds storage without the footprint of the larger Maxsa boxes.
    • Key lock and pair of keys are included.
    • Side-opening lid stays open until closed.
    • Impact-resistant ABS construction.

    Cons:

    • Listed as not water resistant, unlike the D SOLUTIONS 11 cu ft box.
    • Requires vehicle crossbars.
    • 110-pound maximum load must be evenly distributed.

    Best for: Drivers with crossbars who need a compact, lockable box for luggage that can tolerate limited weather protection.

    Not ideal for: People carrying gear that must stay dry in rain, or anyone without vehicle crossbars.

    • Capacity:11 cubic feet
    • Maximum load:110 lb, evenly distributed
    • Dimensions:53 × 34 × 15 in
    • Material:ABS plastic
    • Mounting:Roof mount; requires crossbars
    • Closure:Lock with keys
    • Water resistance:Not water resistant
    • Included components:Cargo box, 4 mounting brackets, pair of keys, mounting hardware
    Our verdict

    “Choose this DNA MOTORING box for compact, lockable storage in drier conditions, but favor the D SOLUTIONS model if weather protection is a priority.”

    → See it on Amazon →

15. Maxsa Innovations Hard-Shell Rooftop Cargo Box, 17 cu ft, 165 lb Capacity

    

    Best Mid-Size Capacity

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    The Maxsa Innovations 17 cu ft is the middle ground for buyers who need more room than the compact 11-cubic-foot boxes but don’t need the full 21 cubic feet of its Maxsa sibling. It keeps the useful features that make that larger model appealing: a waterproof ABS shell, dual-side opening, two-key locking system, and a 165-pound stated capacity. At 35.3 pounds, it is also lighter empty than the Maxsa 21 cu ft box, which may make handling easier before loading.

    Its 68.11-inch length is still substantial, so I’d check roof dimensions and tailgate clearance rather than assuming the smaller capacity means a short box. The listed mounting type is strap, and roof-rack compatibility still needs checking; the supplied details do not specify a manufacturer warranty. Compared with the Thule Pulse 2 M, this Maxsa offers 3 more cubic feet and a higher stated load capacity, while the Thule provides a tool-free mounting system with torque and closure cues. I’d favor this one for capacity and weight, not installation guidance.

    Pros:

    • 17-cubic-foot capacity balances added storage with less volume than the 21-cubic-foot Maxsa.
    • 165-pound stated weight capacity.
    • Dual-side opening and two-key locking system.
    • Waterproof ABS shell and 35.3-pound empty weight.

    Cons:

    • The 68.11-inch length may challenge roof fit or rear clearance.
    • Roof-rack compatibility needs to be checked.
    • Mounting is listed as strap-based, without the Thule Pulse 2 M’s torque-indicator system.

    Best for: Road-trippers who need more room than an 11- or 14-cubic-foot box provides but want a lighter alternative to the Maxsa 21 cu ft model.

    Not ideal for: Drivers with short roofs or uncertain rack compatibility, and buyers who want a specified tool-free mounting system.

    • Capacity:17 cu ft
    • Weight capacity:165 lbs
    • Dimensions:68.11 x 32.68 x 15.35 inches
    • Item weight:35.3 pounds
    • Material:ABS shell
    • Mounting:Strap
    • Fit:Universal; fits most cars and SUVs with compatible roof racks
    • Opening:Dual-side
    Our verdict

    “Pick this Maxsa for a useful step up in capacity from compact boxes without the 21-cubic-foot model’s full volume.”

    → See it on Amazon →

How We Picked

I compared these 15 options by the factors that shape a roof-storage purchase: hard-shell versus soft construction, stated capacity, access, cargo security, fit considerations, and storage after the trip. A larger volume can help with bulky gear, but it does not make a product a better choice if it conflicts with the vehicle’s roof or rack limits. Since the lineup includes both rigid boxes and soft bags, I judged each against the needs it is designed to serve rather than treating them as interchangeable.

The ranking gives priority to clear use-case advantages and useful ownership tradeoffs. The Thule hard-shell options lead for shoppers focused on structured storage and established product positioning; the SportRack earns attention for its rear access, and soft carriers rank well for flexible storage needs. Compact boxes sit lower for buyers who need maximum space, but may make more sense for smaller loads or tighter vehicle setups. I did not assume that listed capacity, locks, or waterproof claims make products equally suitable; buyers should verify the exact fit and limits for their vehicle and rack.

Factors to Consider When Choosing Car Roof Cargo Boxes

Before choosing among these car roof cargo boxes and soft carriers, I’d start with the vehicle and the cargo—not the largest capacity figure. The following checks address common mismatches that can turn a useful storage upgrade into a poor fit.

Match the Load to Your Roof and Rack Limits

Check the vehicle manual and roof-rack instructions for their maximum permitted load before shopping. The limit applies to the combined weight of the carrier, rack components, and cargo, not just the items inside the box. A high-capacity carrier can still be the wrong choice if you plan to load heavy equipment. Capacity in cubic feet describes space, not the safe weight of the load. Keep heavy items inside the vehicle when possible and reserve roof storage for lighter, bulky gear. If the product listing and your vehicle documents disagree, follow the lower applicable limit and confirm compatibility with the manufacturer.

Measure the Roof, Hatch, and Rack Position

Do not assume a box will fit because it is called universal or lists a broad vehicle range. Measure available roof space and check whether the carrier can sit in the intended position without blocking the rear hatch, sunroof, or antenna. A box that extends too far forward can affect visibility or interfere with vehicle features; one too far back may prevent the hatch from opening. Crossbar spacing and shape also affect attachment, so compare your rack measurements with the product’s fit requirements. When measurements are unclear, ask the carrier maker before ordering. This step matters especially for longer boxes on shorter vehicles.

Choose Capacity by Cargo Shape, Not Just Volume

Think about what you will pack: skis and other long items need a different interior shape from duffel bags, camping gear, or strollers. Volume alone does not reveal usable dimensions, and a box can have generous stated capacity but still be a poor match for long or unusually shaped cargo. Make a short list of your largest items and compare their dimensions with the product’s interior measurements. Soft bags can flex around some loads, but they still need to be packed and secured carefully. Avoid buying extra capacity you will rarely use if it adds storage bulk or encourages overloading.

Decide Whether You Need a Hard Shell or a Soft Carrier

A hard-shell box provides a rigid enclosure and often has a lock, which can appeal to buyers who want structured access and a more fixed setup. It can be awkward to store at home when not mounted, and its weight contributes to the roof load. A soft carrier folds away more easily and can suit occasional trips or limited storage space, but attachment and packing require close attention. Weather resistance depends on the design, closure, and how the bag is mounted, so do not treat a waterproof claim as permission to skip careful installation. Pick the format that fits your storage habits as well as your trip.

Plan for Access and Everyday Parking

Opening direction affects how practical a box feels once it is on the car. A rear-opening design can help when one side of the vehicle is close to a wall, while dual-side access can give more flexibility in different parking spaces. Consider where you usually load and unload, and whether you can reach the roof comfortably. A taller vehicle may make frequent access more demanding even when the box has generous capacity. Also check that opening the carrier will not put the lid in the path of a hatch or garage structure. Access details matter most to frequent users, not just during the first installation.

Account for Storage, Maintenance, and Removal

Think beyond the drive: where will the carrier live between trips, and will you remove it after each one? A rigid box needs enough storage space and may be cumbersome to lift on and off, while a soft bag generally takes less room when packed away. Follow the maker’s instructions for cleaning and drying, particularly after wet or dusty trips. Leaving a carrier mounted can affect vehicle clearance and may add wind noise or drag, depending on the vehicle and setup. If you expect to take it off often, consider the removal process and whether you will have help. These practical details can outweigh a small difference in listed capacity.

Frequently Asked Questions

Can I mount one of these carriers without crossbars?

Do not assume that a roof carrier can attach directly to a bare roof. Most hard-shell boxes are designed to connect to a compatible roof-rack system, and soft carriers also require an approved, secure attachment method. Check the specific product instructions and your vehicle manual before buying. A setup that is not approved for your roof can shift or damage the vehicle, even if the carrier appears to sit flat. If your car lacks crossbars, confirm whether the product permits another mounting method before planning a trip.

Should I choose a 20- or 21-cubic-foot soft carrier over a smaller hard box?

Choose based on the cargo and your storage needs rather than the capacity number alone. A larger soft carrier may hold more bulky items and pack away compactly, but it still needs secure attachment and careful loading. A smaller hard box may provide a more structured enclosure and suit a lighter, more organized load. Check interior dimensions, vehicle limits, and the carrier’s mounting requirements before comparing volumes. If you carry the same set of items repeatedly, measuring that load is more useful than selecting the biggest figure.

Is a lockable hard-shell box secure enough to leave on the car overnight?

A lock can help restrict access, but it does not make a roof box theft-proof or remove the need for sensible precautions. Security depends on the box’s lock, how it attaches to the rack, the location where the vehicle is parked, and what you store inside. Avoid leaving valuables visible or unattended on the roof when you can bring them indoors. Review the product’s locking and attachment details rather than treating the word lockable as a guarantee. For overnight stops, choose a well-lit parking area and take irreplaceable items with you.

Will a roof cargo box fit in my garage once it is installed?

Measure the vehicle’s total height with the carrier mounted and compare it with the garage opening and any overhead fixtures. Do not rely on the vehicle’s listed height alone, since the box and rack add height. Leave a margin for uneven floors, door mechanisms, and changes in the vehicle’s load. If you cannot confirm clearance, remove the carrier before entering a low garage. Also consider whether you have a suitable place to store a removed hard shell, since it can take up substantial space.

Can a soft carrier protect luggage as well as a hard-shell box in heavy rain?

Soft carriers can be designed to resist water, but protection depends on the fabric, seams, closure, fit, and installation. A hard shell gives luggage a rigid cover, though its openings and seals also require proper closure and care. For either style, follow the manufacturer’s instructions and pack sensitive items in separate waterproof bags when exposure would cause a serious problem. Do not assume that a product’s waterproof wording means every load will stay dry in every condition. If rain protection is a major concern, check the specific warranty and care guidance before choosing.

Conclusion

For most shoppers seeking a rigid, general-purpose option, I’d start with the Thule Force 3 XL as best overall; choose the Thule Pulse 2 M as best for beginners if its 14-cubic-foot size and dual-side access better match your needs. For best value, compare the hard-shell options from PM PERFORMOTOR, DNA Motoring, D SOLUTIONS, and Maxsa against your rack fit and required capacity rather than paying for unused space. The Thule Force 3 XL is my premium pick, while the SportRack Vista XL is the best fit for rear access. If easy off-season storage and flexible capacity matter most, look at the Sailnovo, Asinking, MIDABAO, or FIVKLEMNZ soft carriers. Whichever you choose, confirm roof-load limits, rack compatibility, and hatch clearance before purchasing.