FIVKLEMNZ Rooftop Cargo Bag 21 cu ft - Waterproof Heavy-Duty Carrier with Anti-Slip Mat & Lock

The FIVKLEMNZ 21 cubic-foot rooftop cargo bag is a waterproof, heavy-duty roof carrier that adds substantial luggage capacity to almost any car, SUV, van, or truck.

If you need more room for luggage, camping gear, or bulky items without sacrificing passenger space, this rooftop bag delivers weather protection, reinforced fastenings, and a compact carry case for off-season storage. Built from durable 840D PVC with double-layer sealing and high-frequency welded seams, it’s designed to resist rain and road wear while keeping loads secure on long trips.

How much extra cargo space does the 21 cu ft bag provide?

The bag measures approximately 52 x 40 x 18 inches and gives about 21 cubic feet of storage—enough for multiple suitcases, a couple of tents, sleeping bags, or bulky sports gear. It’s intended to free up interior space for passengers and pet carriers.

• Holds the equivalent of 4–6 medium suitcases depending on packing
• Rectangular shape stacks compactly on most roofs
• Recommended size for most SUVs and mid-size vehicles

Will it withstand rain, snow, and highway speeds?

The FIVKLEMNZ roof bag uses 840D PVC with double-layer waterproofing and welded seams to block water and resist abrasion. Its reinforced strap system and included anti-slip mat reduce shifting at speed, helping protect both cargo and vehicle finish.

• Double-layered cover and welded seams for weather resistance
• Anti-slip mat to prevent sliding and surface scratches
• Designed for stable highway driving when properly secured

How does installation and security work on cars without a roof rack?

The bag is engineered to fit vehicles with or without existing roof racks. Setup is tool-free and uses reinforced straps and six door hooks to anchor the bag under closed doors; a luggage lock is included for added theft deterrence.

• 10 reinforced straps for even, secure tensioning
• 6 door hooks for rackless installation and quick removal
• Includes a keyed luggage lock to secure zippers when parked

What accessories are included and how does it store when not in use?

The kit arrives ready to mount: anti-slip mat, extra-long straps, door hooks, a compact storage bag, and a luggage lock. When empty, the carrier folds into its storage pouch to save trunk or garage space.

• Storage bag for compact packing between trips
• Anti-slip mat and reinforced straps for added safety
• Lock included to protect belongings from opportunistic theft

Who this is for: Travelers, families, and outdoor enthusiasts who need reliable, weather-resistant rooftop storage without permanent racks will appreciate the FIVKLEMNZ 21 cu ft carrier. It’s best for SUVs and mid-size vehicles that require extra cargo room for vacations, long drives, or seasonal gear. If you have a small car, consider the 15 cu ft option; for very large loads or full-size SUVs, the 30 cu ft model is recommended.