Sliding Rotating Mouse Pad Memory Foam Ergonomic Slipping Mat Hand Wrist Gaming Healthy Mousepad for Game PC Computer Laptop (Black_U) Surface arc design. Feel comfortable. Slow rebound memory cotton to support wrist,keep wrist in a comfortable level. Four stainless steel ball at the bottom of the design, can in the desktop move mat 360 degrees or the mouse move mat 360 degrees. Ball bearing design, to avoid the wrist with wristbands when moving friction, reduce wrist fatigue and injuries. The product can improve the work efficiency, reduce the pain.