These HULL HUGR Fenders are easy to stow and will not puncture or absorb water. The flat design prevents from them from rolling or riding up. Link 2 or more together with the hook and loop straps provided. Manufactured from 3 layer dual density EVA. They’re great for rafting 2 boats together and very popular for sailboats and runabouts. Hook & Loop Strap and Fender Line included.