The Echo knee pad is constructed from a super tough Cordura face fabric, with an air plush lining for supreme comfort. The back side of the pad uses a dual layer Lycra design, that is soft on the inside but strong & durable on the outside. To protect your knees from impact we use SAS-TEC, soft & flexible Visoelastic foam for superior comfort but also extreme impact absorption. A Sharkskin neoprene inner section & dual strap design ensure the pad stays firmly in place. Features Breathable perforated Duratex neoprene with air plush lining, back side with dual layer soft Lycra