The Rightline Gear Non-Skid Roof Pad is designed to keep your car top carrier from shifting while protecting your vehicle's roof at the same time. Sized for use with all car top carriers, the 36" x 38.6" pad can easily be cut to fit underneath smaller carriers. A great safety accessory for car top carrier bags.TEXTURED CONSTRUCTION: Prevents car top carrier bags from shifting in transit. 1 YEAR MANUFACTURER'S WARRANTY: Shop confidently; our service team is based in the USA & skillfully trained to help you with any questions or concerns. ADDED SAFETY: Prevents shifting of car top cargo bags; recommended when using Rightline Gear Car Top Carriers on vehicles without a roof rack. LARGE SIZE: 36" x 38.6"; trim down to fit smaller car top cargo bags.