Built with extra thick 10-mm 100-Percent injected gel and durable 1680-Denier nylon. Solid nylon webbing lower strap with quick clip fastening system.Made with 100-Percent injected GEL and PU foamCovered with durable 1680 Denier nylon solid webbing strap with quick clip releaseFastening system on the bottom and elastic on topIdeal for delicate surfaces like hardwood floors, tile or any other surfaces that you don"t want to mark