Best Roof Trunk For Cars: 10 Soft Bags and Hard Boxes Compared

#1 · Best Overall

1. Asinking 21-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Dimensions: 52"L x 40"W x 18"H
• Material: Polyvinyl Chloride (PVC)

Best for: Weather-focused soft-bag travelers.

Why it ranks #1: Its 21-cubic-foot capacity pairs 840D PVC and triple-reinforced welded seams with a waterproof zipper flap, anti-slip mat, six hooks and extra straps.

Triple-reinforced welded seams pair with heavy-duty 840D PVC to help this 21-cubic-foot Asinking bag resist tearing and rain. Its waterproof zipper is covered by six-inch-wide Velcro flaps, giving road-trippers a layered closure for carrying luggage above the cabin in changing weather.

At 52 by 40 by 18 inches, the bag provides a substantial cargo area for trips when cabin space is spoken for. The 840D abrasion-resistant PVC and triple-reinforced welded seams address wear and potential seam leakage, while the waterproof zipper and wide Velcro flaps add coverage at the opening. A non-slip mat, six door hooks, two extra straps, storage bags, and a luggage lock are included, supporting setup on vehicles with or without racks.

Skip it if you need room for a full moving load; the 40-cubic-foot Mockins XXL bag offers substantially more listed capacity.

Choose this Asinking bag for travelers who want soft-sided roof storage with reinforced seams and extra zipper coverage. Its 21-cubic-foot capacity suits added luggage, but it is not the pick when the largest listed cargo volume is the priority.

Listed on Amazon as: Car Rooftop Cargo Carrier Bag, 21 Cubic Feet 100% Waterproof Heavy Duty 840D Car Roof Bag for All Vehicle with/Without Racks – Anti-Slip Mat, 6 Door Hooks, Storage Bags, 2 Extra Straps, Luggage Lock

#2 · Highest Capacity

2. Mockins 40-Cubic-Foot Roof Bag

• Material Type: 840D, Vinyl
• Dimensions: 72"L x 48"W x 20"H
• Material: 840D, Vinyl

Best for: Maximum-volume trip packers.

Why it ranks #2: The 40-cubic-foot bag is the largest listed option and includes a roof mat, lock, six door hooks, three buckle straps and three ratchet straps.

The Mockins bag’s 40-cubic-foot capacity gives it the largest stated storage volume in this group, creating room for bulky trip or moving loads. Its 72-by-48-by-20-inch soft shell fits vehicles with or without crossbars, side rails, and roof racks, broadening its usefulness across vehicle setups.

The 840D abrasion-resistant vinyl construction is paired with waterproof zippers, protective flaps, and Velcro closures, helping shield packed gear through wet travel. Its 40-cubic-foot interior can accommodate the mix of suitcases, sleeping bags, and tents described for the bag, while the large footprint is suited to substantial loads. Included roof mat, lock, storage bag, three buckle straps, three ratchet straps, six door hooks, and two trunk hooks give buyers multiple listed securing components.

Skip it if you want a compact carrier for a smaller load; the Yakima RocketBox Pro 14 has a narrower 33-inch width.

This Mockins suits families, campers, or movers carrying bulky gear who can use its unusually large stated capacity. Its broad 72-by-48-inch footprint makes roof space a key consideration before choosing it.

Listed on Amazon as: Mockins 40 CuFt XXL Car Roof Bag 72"x48"x20" Soft-Shell 840D w/Accessories

#3 · Best Hard Box

3. SportRack Vista XL Cargo Box

• Material Type: Plastic
• Dimensions: 62.5 x 39 x 19 in
• Material: Plastic

Best for: Rack-equipped box commuters.

Why it ranks #3: This 18-cubic-foot ABS box has a rear opening, lock and tool-free mounting hardware, with a listed 100-pound load capacity and 25-year warranty.

Rear opening is the SportRack Vista XL’s key access advantage, letting users reach cargo from the side away from traffic. The hard-shell box offers 18 cubic feet of storage in UV-resistant ABS, with tool-free mounting hardware and a lock for the box and its contents.

The rear-opening design changes loading workflow by placing access away from passing traffic, a practical benefit at roadside stops. Tool-free mounting hardware supports installation and removal without tools, while the included lock secures both contents and the box to the rack. Its 18-cubic-foot interior is made from durable, UV-resistant ABS. Compatibility is listed for SportRack systems, square and round bars, and most factory racks; crossbar spacing must fall within the specified range.

Skip it if you have no roof rack; the rack-free Mockins 40 CuFt soft bag is listed for vehicles without racks.

The Vista XL suits rack-equipped drivers who value a hard box and rear-side loading for regular travel. Check rack compatibility and crossbar spacing, and choose a soft carrier instead if your vehicle lacks a roof rack.

Listed on Amazon as: SportRack Vista XL Rear Opening Cargo Box,Black

#4 · Best Small Box

4. Yakima RocketBox Pro 14

• Material Type: Plastic
• Dimensions: 74"L x 33"W x 16"H
• Material: Plastic

Best for: Small-car hard-box campers.

Why it ranks #4: Its 14-cubic-foot hard-shell format suits smaller vehicles and up to two campers; forward mounting hardware is designed to improve hatch clearance.

Forward mounting hardware on the Yakima RocketBox Pro 14 improves hatch clearance, making access a key fit advantage for smaller cars and hatchbacks. This hard rooftop box adds 14 cubic feet, uses an aerodynamic design to reduce drag, and includes SKS locks for its contents.

The 74-by-33-by-16-inch box provides a long, relatively narrow cargo area for gear for up to two campers, while its 14-cubic-foot capacity defines the load scale. Forward mounting hardware improves hatch clearance, helping preserve access to the rear of compatible vehicles. Yakima specifies an aerodynamic design to reduce drag, and the included SKS locks provide a way to secure contents. At 50.8 pounds, the box is a substantial piece of equipment to handle during installation or storage.

Skip it if you need more cargo volume for a family load; the SportRack Vista XL offers 18 cubic feet in a hard box.

The RocketBox Pro 14 suits small-car and hatchback owners carrying gear for up to two campers who value hatch clearance. Its 14-cubic-foot capacity and 50.8-pound weight are important boundaries for larger loads and handling.

Listed on Amazon as: Yakima – RocketBox Pro 14, Multi-Sport Rooftop Cargo Box for Cars, Wagons and SUVs (adds 14 Cubic ft. of Storage)

#5

5. Asinking 20-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Dimensions: 40"L x 52"W x 18.5"H
• Material: Polyvinyl Chloride (PVC)

Best for: Compact 20-cubic-foot packing.

Why it ranks #5: This 20-cubic-foot PVC bag includes a non-slip mat, combination lock, storage bag and four anti-scratch door hooks, plus a stated two-year quality warranty.

A 20-cubic-foot capacity in a 40-by-52-by-18.5-inch soft bag gives this Asinking carrier a defined middle ground for added trip luggage. It is listed for vehicles with or without a rack and includes a non-slip mat, combination lock, storage bag, and four anti-scratch door hooks.

The included four door hooks provide a listed mounting option for vehicles without racks, while the non-slip mat is supplied as part of the setup kit. A combination lock addresses securing the packed carrier, and the storage bag gives owners a place to keep it when it is not on the roof. At 20 cubic feet, it offers meaningful added cargo room, though the supplied product information does not specify fabric construction or closure details.

Skip it if you need a stated heavy-duty fabric and closure specification; FIVKLEMNZ lists 840D PVC and welded seams.

Consider this Asinking model for travelers who want a 20-cubic-foot soft carrier with hooks, a mat, and storage bag included. Buyers prioritizing detailed material and weather-sealing specifications should compare those facts before selecting it.

Listed on Amazon as: Asinking Car Rooftop Cargo Carrier Bag, 100% Waterproof Non-Rip 20 Cubic Feet Car Roof Bag for All Vehicles with/Without Rack, Includes Non-Slip Mat, Luggage Lock, 4 Door Hooks, Storage Bag

#6

6. TANX 21-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Dimensions: 52"L x 40"W x 17"H
• Material: Polyvinyl Chloride (PVC)

Best for: Rain-ready high-capacity packers.

Why it ranks #6: The 21-cubic-foot bag lists 500D PVC tarpaulin, sealed seams, 12 reinforced straps, six door hooks, an anti-slip mat and a luggage lock.

High-frequency voltage-sealed seams pair with 500D PVC tarpaulin and grid material to define the TANX bag’s weather and tear protection. Its 21-cubic-foot capacity and listed fit for cars with or without roof racks give travelers substantial added storage with multiple mounting components included.

The high-frequency sealing process is specified to seal seams against rain and snow, while the rugged 500D PVC tarpaulin and grid material are described as tear-resistant. At 52 by 40 by 17 inches, the 21-cubic-foot interior offers room for a substantial trip load. Twelve reinforced straps provide several securing points, and six door hooks support rack-free installation. The included anti-slip mat, luggage lock, and storage bag round out setup, security, and off-roof storage needs.

Skip it if you specifically want 840D PVC; Asinking’s 21-cubic-foot B098SCL6WY bag lists that heavier fabric specification.

TANX suits travelers seeking 21 cubic feet of soft-sided storage, sealed seams, and numerous attachment points for a rack-free or rack-equipped vehicle. Its 500D material specification is worth weighing against fabric preference.

Listed on Amazon as: TANX Car Roof Bag – 21 Cubic Feet Rooftop Cargo Carrier, Waterproof for All Cars with/Without Roof Rack, Includes Anti-Slip Mat, 12 Reinforced Straps, 6 Door Hooks, Luggage Lock & Storage Bag

#7

7. Sailnovo 20-Cubic-Foot Roof Bag

• Material Type: 1000D Oxford cloth,The Zipper lining is made…
• Dimensions: 51"L x 39"W x 17"H
• Material: 1000D Oxford cloth,The Zipper lining is made…

Best for: Multi-suitcase soft-bag travelers.

Why it ranks #7: Its 20-cubic-foot capacity and 1000D Oxford cloth are paired with six door hooks, two extra luggage straps and a one-year warranty.

Sailnovo lists room for four to six medium suitcases within its 20-cubic-foot, 51-by-39-by-17-inch roof bag. Heavy-duty buckles, waterproof zippers, sturdy door hooks, and reinforced dual stitching provide specific securing and construction details for travelers adding luggage or camping equipment above the cabin.

The stated capacity and dimensions give buyers a useful scale for packing medium suitcases, tents, or sleeping bags. Reinforced dual stitching works alongside the heavy-duty buckles and door hooks to support secure attachment, while waterproof zippers address the opening during travel. The kit includes two extra luggage straps, six extra door hooks, and a carrying bag. For crossbar installations, the supplied instructions specify detachable straps and a spacing condition, so installation depends on the roof setup.

Skip it if you need a carrier without a crossbar-spacing condition; the Asinking 20-cubic-foot bag is listed for vehicles with or without racks.

Sailnovo suits travelers packing several medium suitcases or camping gear who want a soft bag with extra securing pieces. Buyers using crossbars should account for the stated spacing and installation guidance before loading.

Listed on Amazon as: Sailnovo Rooftop Cargo Carrier roof Bag, 20 Cuft fit Cars with/Without Rack

#8

8. WORKPRO 21-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Dimensions: 52"L x 40"W x 17"H
• Material: Polyvinyl Chloride (PVC)

Best for: Low-light visibility prioritizers.

Why it ranks #8: This 21-cubic-foot PVC bag includes an anti-slip mat and 10 adjustable straps; its rear reflective stripe is a distinguishing visibility feature.

A full-length reflective stripe at the rear distinguishes the WORKPRO bag, adding visibility during low-light and nighttime driving. Its 21-cubic-foot capacity measures 52 by 40 by 17 inches, while ten reinforced adjustable straps and an included anti-slip mat provide multiple listed elements for securing the roof load.

The reflective rear stripe is intended to improve visibility in low-light conditions, a relevant feature for drivers traveling after dark. Ten reinforced adjustable straps offer several adjustment points for keeping the carrier in place, and the anti-slip mat is included to limit movement and protect the roof surface. Triple heat-welded seams strengthen the bonds between straps and bag. At 21 cubic feet, it provides a substantial soft-sided addition for trip luggage without the hard-box format.

Skip it if you prioritize a lifetime warranty; the Yakima RocketBox Pro 14 lists a limited lifetime warranty rather than WORKPRO’s two years.

Choose WORKPRO if nighttime visibility and numerous adjustable straps matter for carrying travel gear in a soft bag. Its 21-cubic-foot capacity is generous, while buyers focused on warranty duration may prefer another listed option.

Listed on Amazon as: WORKPRO Rooftop Cargo Carrier Bag, 21 Cubic Feet Waterproof Car Roof Bag

#9

9. FIVKLEMNZ 15-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Dimensions: 46"L x 34"W x 17"H
• Material: Polyvinyl Chloride (PVC)

Best for: Rain-conscious smaller-load travelers.

Why it ranks #9: The 15-cubic-foot bag has 840D PVC, welded seams and a double-layer waterproof cover, with an anti-slip mat, reinforced straps and six door hooks.

High-frequency welded seams and a double-layered waterproof cover are the FIVKLEMNZ bag’s defining weather-protection details. Its 15-cubic-foot capacity and 46-by-34-by-17-inch dimensions make it a smaller-load option for road trips, camping, or family vacations, with listed compatibility for vehicles with or without a rack.

The upgraded 840D PVC and welded seams are specified to keep luggage dry in heavy rain, snow, or long-distance travel, while the double-layer cover adds another stated barrier. At 15 cubic feet, this carrier adds roof storage without taking the larger capacity of the 20- or 21-cubic-foot bags. The product title lists an anti-slip mat, reinforced straps, six door hooks, and luggage lock, giving buyers several included setup and security components.

Skip it if you need more than 15 cubic feet for luggage; the Asinking 20-cubic-foot carrier provides greater stated capacity.

This FIVKLEMNZ carrier fits travelers prioritizing specified rain protection for a moderate load, including camping or family-trip gear. Its 15-cubic-foot capacity is the boundary to weigh when packing larger suitcases or bulky equipment.

Listed on Amazon as: FIVKLEMNZ Car Rooftop Cargo Carrier Roof Bag Waterproof for All Top of Vehicle with/Without Rack Includes Topper Anti-Slip Mat + Reinforced Straps + 6 Door Hooks + Luggage Lock

#10

10. MIKKUPPA 15-Cubic-Foot Roof Bag

• Material Type: Polyvinyl Chloride (PVC)
• Material: Polyvinyl Chloride (PVC)

Best for: Fold-away rack-free travelers.

Why it ranks #10: This 15-cubic-foot PVC bag is described as fitting vehicles with or without racks and includes an anti-slip mat, storage bag and combination lock.

The MIKKUPPA bag folds flat into its carry pouch when not in use, giving occasional travelers a defined storage advantage between trips. It adds 15 cubic feet and is listed for vehicles with or without roof racks, using crossbar straps with racks or six door hooks without them.

The rack/no-rack mounting options let owners use crossbars where available or the six door hooks for a vehicle without a rack. The 15-cubic-foot capacity is described as fitting four suitcases or full camping gear, giving a practical packing reference. When the trip ends, the bag folds flat into the included storage pouch, reducing the space needed to keep it. An anti-slip mat and combination lock are also included in the listed kit.

Skip it if you need 21 cubic feet for a larger trip load; the TANX 21-cubic-foot bag offers more stated capacity.

MIKKUPPA works for occasional travelers who need a rack-free mounting option and compact storage between trips. Its 15-cubic-foot capacity suits a moderate load, but bulky gear may call for a higher-capacity carrier.

Listed on Amazon as: MIKKUPPA Car Rooftop Cargo Carrier, 15 Cubic Feet, Waterproof PVC Roof Bag