Impact Guard protects first knuckle with EVA foam covered by rubberized grip materialTPR (Thermal Plastic Rubber) on the knuckle and fingers protects against impacts. Trek Dry stretch fabric on the back of the hand provides ventilation and wicks moisture. TPR (Thermal Plastic Rubber) hook and loop closure for a secure fit. Rubberized tacky grip material on the thumb and index finger provides extra gripping power. Second layer of material in high wear areas. Second layer of material with 2mm of Poron XRD for impact and vibration absorption. Durable synthetic leather palm.