Special modified EVA Foam forearm and triceps, Extremely lightweight adn superior form fitting protection. FitLite elbow technology, lightweight form fitting protection. F.I.T. elbow construction , conforming elbow for a custom fit. F.A.V. system, comfort throgh superior air circulation with added protection. Griptonite on the forearm and triceps, locks in the perfect fit and keeps the pad from sliding down th arm. reebok play dry wicks moisture away from the body. Memory foam elbow and arm, ultimate in fit,feel and performance in the elbow cap and lower arm.