Supports legs to reduce muscle strain and fatigue. Nonskid feet for stability. Tool-free height adjustment. Full-featured foot rest with greater leg, back and foot comfort. Shock-absorbing gel soothes tired feet and eliminates stress on pressure points. With a flick-of-the-foot operated lock, the angle can be adjusted perfectly for all-day back and leg comfort. Height adjusts from 3-1/4" to 4-1/4". 17-7/10"x13-4/5".