Shouhengda Wrist Rest Thicken Mouse Pad Square Optical-trackball Mat (purple) Back Side Material: Neoprene Rubber. (This Material will avoid Mouse Pad from Sliding) Size: 210*230*4mm (1inch=2.54cm) Human Wrist Protection Design, will make your Wrist comfortable when using mouse. This Mouse Pad will help your Mouse get an Accurate Tracking and click. Packages: 1x High Quality Wrist Comfort Mouse Pad