Package Contents: You will receive 2 mouse wrist rests, available in gray and black. Portable and fits in your bag. Material: Mainly made of silicone, the mouse glider achieves a good balance between support and comfort. Note: For right hand only. Curved Design: The unique curved design fits perfectly in the palm of your hand. The mouse rest reinforces wrist-to-palm pressure and relieves wrist pressure by lifting the palm 0.6 inches off the desktop. For ing and engineering: The ergonomic palm support pad is specially designed for ers and coding engineers suffering from carpal tunnel syndrome and repetitive strain injuries, which can greatly reduce friction and pressure on the wrist. How to use: Take a moment to align your palm before holding the mouse. Once your palm is comfortably on the wrist rest, it will slide with your wrist and your wrist will thank you.