When used with flat mice and trackballs, the Slim Duo Gel Wrist Rest for Mouse/Trackball is an ergonomic accessory designed for optimal comfort. The gel-filled cushion conforms to the natural curve of your wrist and hand, providing optimal support to reduce strain and discomfort in the wrist. The innovative ventilation channel keeps your wrist and hand cool and dry. Its two-tone color scheme adds a pop of color to any workspace, while its soft, easy-to-clean surface ensures durability and a pristine appearance.