Ergodyne ProFlex® Gel Knee Pads. Cut-resistant, abrasion-resistant, and non-marring 420D nylon and Hypalon® rubber composite pad. Slip-resistant durable nylon-rubber surface. 1680D ballistic nylon outer shell for puncture resistance. Breathable neoprene stretch strap adjusts for secure, comfortable fit. Wipe clean with damp cloth. 12mm NBR Gel padding and 20mm EVA padding. Hook and loop closure.