It is made of lycra fabric and silicone. It is soft and comfortable, filled with memory foam, has good elasticity, and is ergonomically designed to help prevent carpal tunnel syndrome, reduce wrist pain, soreness and long-term computer pain. Not easy to out of shape and ideal for longer hours of use. It is suitable for long-term computer office workers, white-collar workers, Internet cafes, game lovers. 9" L x 7 1/2" W