Ramena RBK 9K ASD™ CONSTRUCTION combines pro level protection with an improved range of motion. The joint discharge principle (JDP®) was created by JOFA engineers who understood that softer tissue was better at absorbing hits than fragile kneecaps, shoulders and elbows. PE and MOLDED FOAM protect while providing industry leading safety. Features: - ASD™ CONSTRUCTION anatomically designed to provide pro level protection and improve mobility - JDP® SHOULDER CAPS engineered to disperse impact energy away from the joint - LOCK STRAP designed to secure the elbow in the proper position - HYPER X TECHNOLOGY combines with the LOCK STRAP to help prevent injuries from hyperextension - THE 3 POINT SYSTEM comfortably secures the calf muscle at it's widest point