Ergo Wrist Assist is ergonomically designed to promote optimum wrist positioning and arm movement when mousing. It provides smooth mousing with no edge to slide off. Easily adjustable wrist cradle allows you to change the position to fit anywhere along the length of your arm. Memory foam material that adjusts to your body temperature optimizes your comfort by contouring your wrist.Ergo Wrist Assist is ergonomically designed to promote optimum wrist positioning and arm movement when mousing. It provides smooth mousing with no edge to slide off. Easily adjustable wrist cradle allows you to change the position to fit anywhere along the length of your arm. Memory foam material that adjusts to your body temperature optimizes your comfort by contouring your wrist.