【Maximum 21 Cubic Ft Storage Space】- Our rooftop cargo carrier with maximum 21 Cubic Ft storage space is more larger than the car roof bag sold at market, which can effectively solve the problem of limited storage space in the car. They can easily hold all luggage for 5-8 people, perfect for a long trip with family or friends. 【Expadable15 to 21 Cubic Ft】- With updating straps design, our car top carriers are equipped with 6PCS adjustable short straps + 2PCS adjustable long straps across the whole bag, you can easily expand our vehicle cargo carriers from 15 to 21 Cubic Ft by adjusting the length of the straps according your specific needs on storage space. Besides, these 8pcs reinforced & widen straps on rooftop cargo bag can better keep your items firm and safe even at high speeds at any terrains. 【Perfect Waterproof Capacity】- Our waterproof rooftop cargo carriers adopt genuine waterproof zipper and 4.7 inches lengthened upgrade Velcro with double PVC waterproof coating. All seams are heat welded and stitched to ensure they are watertight, even if you encounter heavy rain or snow during the journey, your items can also keep 100% dry and clean. 【Made by 700D PVC Fabric】- Our upgraded car roof cargo carrier uses abrasion-resistant 700D PVC fabric has better capacity to resist rips, wear and tear under rugged conditions than the car roof bag using 500D PVC fabric. It provides perfect weather protection even in extreme conditions such as wind, sun, rain, snow, and sand. Besides, its soft design allows you to carry odd-shaped objects that might not fit under hard shell rooftop cargo carrier. 【Universal Fit Design & Easy to Install】-this luggage carrier for car rooftop is suitable for any car, truck or SUV. The car top carrier roof bag can be quickly installed in just minutes, with or without an existing roof rack. This vehicle cargo carriers also features a protective mat and 6 Door Hooks 2 Luggage Straps to ensure it stays in place even at high speeds or on rough terrain, and protect your car roof from scratches and damage.