The Rightline Gear Sport Jr Car Top Carrier is the only car top bag made specifically for compact cars WITHOUT a roof rack. The carrier is aerodynamically designed to help save $$$ at the gas pump, 100% waterproof, and unzips 3/4 of the way around for easy loading. The included Car Clips attach the carrier's straps under the vehicle's door frame weather molding. Remove the Clips from the straps to attach the straps to a vehicle's roof rack. Capacity: 9 cu ft Dimensions: 36" L x 30" W x 13-16" H 100% Waterproof with Dual Seam Technology - Sewn for Strength/Welded Waterproof Aerodynamically designed for compact cars WITHOUT roof racks (can be used on larger vehicles and vehicles with roof racks) PVC Mesh (nylon re-enforced PVC) and Hydrotuff Material (PVC-backed polyester), UV resistant ZipRight System; a urethane coated zipper located on the protective flap keeps water out Includes: carrier, (2) nylon straps, (4) Car Clips, stuff sack, and sewn-in set up guide This product ships in approximately 1 days