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