Xtak Knee Pads are extremely light and flexible and provide superior protection, while remaining flexible enough to move way body moves. Thermal plastic urethane (Tpu) shell with a Cordura nylon construction and EVA high-density foam offers superior shock absorption. Cool Max inner surface wicks away moisture and anti-skid inner surface helps keep pad secured. Hatch Rapid Deployment Clips with hook and loop closure for secure fit. One size fits all.