Made of high quality silicone material, feel real comfortable lubrication. Ergonomically designed, to give you a safe and comfortable wrist protection, reduce long-term use mouse wrist fatigue, promotes proper hand and wrist movement, long-term use of computer workers and gamers choice! Note The wrist rest surface have a layer of transparent film, can not tear up that layer which is silicone membrane, if removed, there will be very sticky silicone, completely unusable.