ERGONOMIC FOOT ROCKER - Improve circulation and reduce leg fatigue if you sit for long periods of time by using this office foot rest under your desk. TWO SETTINGS - The height settings are pre-set, so to adjust the height all you have to do is flip the office footrest over for either a full rocking motion, or a short rocking motion. ANTI-SLIP DESIGN - This ergonomic footrest rocker features ridges on the footrest area and rubber tread to keep it in place. STANDING DESK FOOTREST - This can be used while either sitting or standing! Place both feet on desk footstool while sitting, and one foot on it while standing. FEATURES - This adjustable desk foot rest measures at 17.5 x 10.5 inches, and can support up to 22 pounds. Tilt the footrest back or forward up to 45 degrees.