These arm guards utilize Reebok FitLite elbow technology which is lightweight and offers form fitting protection. The FIT elbow construction allows for a conforming elbow for custom fit. Griptonite on the forearm and triceps area locks in the perfect fit and keeps pad from sliding down the arm. Reebok Play Dry wicks moisture away form the body. Form fitting lycra sleeves - Prevents slippage while improving comfort and the ergonomic and anatomical elbow cap design.