✅【MOST SAFE DESIGN】: For security reasons, our cargo roof carrier use 8 reinforced adjustable straps to keep the cargo carrier in place. Even on high-speed roads or bumpy roads, it can keep the cargo bag in place without slipping or scratching your car. ✅【OVERSIZED 20 CUBIC FEET】Massive 20 cubic feet (L40" x W52" x H17.5") of space can easily hold all luggage of a family of 5-6. Most other roof cargo carriers are small and there is not enough room to accommodate everything you need. ✅【HIGH DENSITY 1000D PVC】Features triple-layer high density 1000D PVC fabric. This material is 2 times stronger than 500D PVC fabric, which most other rooftop bags adopts and can easily rip. The coated surface can effectively protect your luggage against rain, grit, snow, wind and sun on the road. ✅【EASY TO INSTALL】rooftop cargo carrier fits for any car, truck, or SUV. If there is not roof side rails on your car, it can be quickly and easily installed to roof rack in minutes with 8 Reinforced Straps ✅【MULTIPLE SECURITY】We notice that the straps of other cargo bags can easily rip from the seam, so we doubly reinforced the strap seam. And all seams of this cargo bag are heat welded and stitched to ensure they are watertight.And comes with 8 Reinforced Straps