Need extra space for luggage, camping gear, or sports equipment? These soft roof cargo bags are designed to expand capacity without drilling into your vehicle. This guide highlights five standout options suited to different needs—from rugged waterproof protection to easy installation on any car with or without a rack. The top picks are best for families on road trips, weekend travelers, and outdoor enthusiasts who want secure, weatherproof storage. The table below compares key details to help you choose quickly.
| Product | Capacity | Best For | Why It Stands Out |
|---|---|---|---|
| Asinking 21 Cu Ft Roof Bag | 21 cu ft | Large families, extended trips | Heavy-duty 840D material, reinforced seams, waterproof with anti-slip mat |
| Asinking 15 Cu Ft Roof Bag | 15 cu ft | Everyday travel, frequent movers | Compact but sturdy, strong waterproofing, easy installation |
| FIVKLEMNZ 15 Cu Ft Roof Bag | 15 cu ft | Budget-friendly stability | Double-layer waterproof cover, 8 straps, 6 door hooks |
| CARGOSMART 38”x38”x18” | Up to 15 cu ft | Versatile racks or no rack setups | Vinyl body, easy mounting on roof racks or baskets |
| P.I. AUTO STORE 16 Cu Ft | 16 cu ft | Longer trips, family camping | Weatherproof nylon with triple protection, anti-slip mat |
Asinking 21 Cu Ft Roof Bag
Best for large families or long trips, this 21 cubic foot roof bag uses 840D material and triple-reinforced welded seams for durability. It features a waterproof zipper with wide Velcro flaps and reinforced seams for reliable protection in heavy rain. An anti-slip mat and eight adjustable straps help secure it to most vehicles, with door hooks and buckles that simplify setup. Choose this if you need substantial capacity without adding a second bag or rack. Caution: heavier bags may affect fuel economy and require careful securing at highway speeds.
Asinking 15 Cu Ft Roof Bag
This 15 cubic foot option is compact yet sturdy, ideal for couples or small families who still want extra trunk space. It uses the same 840D material and waterproof design as the larger model, with reinforced seams to minimize tearing. The installation system includes an anti-slip mat and multiple straps for secure anchoring. Best for balanced capacity and ease of use, but may be less suitable for very long trips with bulky gear if you need max space.
FIVKLEMNZ 15 Cu Ft Roof Bag
This option emphasizes security and weather protection, featuring a double-layer waterproof cover and high-frequency welded seams. It expands by up to 15 cubic feet and includes eight reinforced straps plus six door hooks for stable, road-ready mounting. Best for travelers who prioritize robust waterproofing and a straightforward install. Limitation: heavier wind loading may require careful tightening, especially on highway speeds.
CARGOSMART Soft Sided Cargo Bag
Best for travelers with or without roof racks, this 38” by 38” by 18” bag offers up to 15 cubic feet of extra storage. Made from heavy-duty vinyl, it protects cargo with a sturdy zipper and flap to resist dirt and moisture. It’s a versatile choice for mounting on roof racks or on top of a roof basket. Choose this when you want a simple, rack-flexible option. Limitation: bulkier bags can be more challenging to store when not in use.
P.I. AUTO STORE 16 Cu Ft Roof Bag
Best for medium-length trips and family camping, this 16 cubic foot bag uses 100% waterproof nylon with triple waterproof protection through heat-welded seams and a reliable zipper. It comes with a free anti-slip mat to protect your car roof and secure fit via four sturdy straps. Opt for this if you want dependable weatherproofing on a moderate budget, while keeping installation straightforward. Limitation: fewer advanced features than higher-priced models may be noticeable on very windy highways.
Buying Guide
What capacity do you need? Match bag size to your typical load. If you routinely carry luggage for a family, a larger bag (20+ cu ft) can be convenient, but weigh the impact on fuel economy and road handling.
How weatherproof should it be? Look for welded seams, reinforced stitching, and weatherproof zippers. Double-layer covers add extra protection in heavy rain or snow.
How secure is the mounting system? A bag with eight or more straps plus door hooks tends to stay steadier at highway speeds. An anti-slip mat helps prevent scratches on painted roofs.
Is the bag compatible with your vehicle? Some bags require a roof rack, while others work with or without one. Check your vehicle’s roof height and compatibility with door hooks or clamps.
Material and durability matter. 840D PVC fabric is commonly cited for rugged use, offering abrasion resistance and longer life under outdoor conditions.
Frequently Asked Questions
- Do soft roof bags require a roof rack? Some models work with or without racks, while others are best paired with roof rails or a basket.
- Are these bags waterproof? Most are designed to be waterproof or water-resistant with reinforced seams and weatherproof zippers; verify the zipper flaps and seam construction.
- Can I install these bags on any vehicle? In most cases, yes, but you should check door hook compatibility and strap length to ensure a secure fit for your car’s roof.
- What is the best way to secure a roof bag for wind at highway speeds? Use all included straps, tighten evenly, and use anti-slip mats to prevent movement and protect the roof surface.
- How should I store a roof bag when not in use? Empty the bag, clean and dry it, then store in a compact position or storage bag to preserve fabric longevity.
- Can roof bags damage the car roof? When properly secured and mounted, the risk is minimized. Always use protective mats and avoid overtightening straps.