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 and durable on the outside.To protect your knees from impact we use SAS-TEC, soft and flexible Visoelastic foam for superior comfort but also extreme impact absorption. A Sharkskin neoprene inner section and dual strap design ensure the pad stays firmly in place.