FIVKLEMNZ Rooftop Cargo Carrier 21 cu ft Waterproof Soft Roof Bag — 840D PVC, Welded Seams

The FIVKLEMNZ 21 cubic-foot rooftop cargo carrier is a heavy-duty, waterproof soft roof bag that adds large external storage for road trips and family travel.

If your vehicle fills up fast on vacations, weekend camping trips, or moving days, this rooftop bag delivers a roomy, weather-resistant solution without permanent racks. Constructed from reinforced 840D PVC with welded seams and a layered cover, it’s built to keep gear dry while expanding your load capacity by roughly four to six suitcases’ worth. The carrier balances weather protection, attachment security, and packability so you can clear interior space and travel more comfortably.

How weatherproof and durable is this rooftop bag?

The bag uses upgraded 840D PVC fabric plus high-frequency welded seams and a double-layer rain cover to resist heavy rain and snow. It’s designed to shield luggage from typical roadside weather and the wear of long drives without the stiffness of a rigid box.

• 840D PVC outer shell for abrasion resistance
• High-frequency welded seams to block water ingress
• Double-layer waterproof cover for extra protection
• Lightweight soft construction that still withstands road use

Will it stay secure at highway speeds and on different cars?

This model includes ten reinforced straps, six door hooks, an anti-slip mat, and a set of reinforced fasteners to minimize shifting and protect paint. The combination of straps and hooks helps anchor the bag to sedans, SUVs, vans, and trucks—whether you have crossbars or no roof rack at all.

• Ten heavy-duty attachment straps for even load distribution
• Six door hooks that clamp to door frames for added security
• Anti-slip mat reduces movement and prevents roof scratches
• Suitable for vehicles with or without factory roof rails

How much gear fits inside and what are the dimensions?

The carrier offers approximately 21 cubic feet of cargo volume (52 x 40 x 18 inches), enough for several suitcases, camping gear, or bulky seasonal items. That capacity helps free up passenger space and keeps items organized outside the cabin for easier loading and unloading.

• 21 cubic-foot capacity—fits 4–6 medium suitcases
• External dimensions: 52" L x 40" W x 18" H
• Holds tents, sleeping bags, backpacks, and sports gear
• Compressible when empty for convenient storage

What comes with the bag and how do I choose the right size?

The package is a complete travel kit with an anti-slip mat, a luggage lock, reinforced straps, six door hooks, and a storage sack for the bag when not in use. For vehicle fit: smaller cars may prefer a 15 cubic-foot bag, SUVs typically match well with 21 cubic feet, and larger SUVs or full-size vehicles can opt for 30 cubic feet.

• Included anti-slip mat and reinforced attachment straps
• Luggage lock for basic theft deterrence during stops
• Storage bag to keep the carrier compact when unused
• Size guidance: 15 cu ft (small cars), 21 cu ft (most SUVs), 30 cu ft (large vehicles)

Who is this for: The FIVKLEMNZ 21 cubic rooftop cargo carrier suits families, outdoor enthusiasts, and travelers who regularly need more space without installing permanent roof racks. It’s a practical choice for anyone who wants a weather-protective, portable solution to carry luggage, camping equipment, sports gear, or bulky items while keeping the vehicle interior comfortable and organized.