It has anti-slip rubber and has a protective rubber on the surface that catches the desk with high fixation and is difficult to move. The arm tray has an arc-shaped design that supports your arm, making it comfortable to use and releases your shoulder force. This wrist rest can reduce fatigue when working on a desk for a long time. It helps relieve wrist fatigue by supporting your arms when using the keyboard.Prevents stiff shoulders and tendonitis It has just the right altitude and arc degrees, reducing the burden on your wrist and allowing you to work comfortably. The surface is made of smooth ester material for a refreshing and non-sticky experience.