KEEPER® Rooftop Cargo Bag Pad is designed with a non-slip mat to prevent your cargo bag from shifting on top of your vehicle and to protect your roof. The mat is 46” X 36” inches and can be trimmed to create a custom fit. Constructed from polyester mesh fabric with PVC foam and is waterproof. This pad perfectly complements existing Keeper cargo bag or any standard rooftop cargo bag. Please see instructions for use and installation as noted on the packaging.