Tommyco GEL307 Injected Gel Nylon Knee Pads Nylon Cloth with EVA+pu foam and injected gel Imported Made with 100-Percent injected GEL and PU foam Covered with durable 1680 Denier nylon solid webbing strap with quick clip release Fastening system on the bottom and elastic on top Ideal for delicate surfaces like hardwood floors, tile or any other surfaces that you don't want to mark