The Alpha Elbow Pad is made of breathable, perforated neoprene with a soft, air-permeable inner lining and firmer Duratex neoprene in the front impact area. The back of the pad consists of a double layer of soft Lycra for a comfortable fit. To protect your elbow from impact, we use EVA foam under a hard nylon cap. This year we've also added an internal Sharkskin neoprene gripper to keep the pad firmly in place.