The Rightline Gear Sport Jr. Car Top Carrier is 100% waterproof and attaches to vehicles WITH or WITHOUT a roof rack. Attach the carrier's straps to a vehicle's roof rack or use the Car Clips to attach the straps to a vehicle's door frame weather molding. The intuitive attachment method and simplified design of the Sport Carrier makes carrying extra cargo easy. The Sport Carrier SZIP Waterproof Zipper is a 100% waterproof zipper that does not require a zipper flap. The carrier's enclosed front end helps you fit your gear to the size of the carrier and prevents overfilling. The advanced SZIP makes the carrier design ultra-simple and super easy to use. The carrier is made from UV-protected PVC Semi-Coated Mesh XT, a premium polyester reinforced PVC. All seams are welded along the stitching to make them waterproof. The result is a highly durable cargo bag that lets you travel with peace of mind, knowing your gear will stay dry. After use, the Sport Carrier can be folded into a stuff sack for storage. SPORT JR. CAR TOP CARRIERThe only car top bag made specifically for compact cars.• Capacity: 10 cu. ft.• Dimensions: 36"L x 30"W x 16"H• Aerodynamically designed for compact cars with or without a roof rack• Can also be used on larger vehicles)• 100% waterproof with welded seams and SZIP waterproof zipper• Enclosed front end helps fits your gear to the size of the carrier• Includes carrier, four attachment straps, four Car Clips, and stuff sack 100% waterproof with SZIP waterproof zipper & welded seams Folds into a stuff sack for storage Capacity: 10 cu. ft.