Optimal ergonomics calls for proper foot support without pinching at the ankles. The adjustable height and angle FootRester™ adapts along with your movements to correctly support your feet as you move in your seat. The platform's fluid rocking motion automatically adjusts with changes in body position. This adjustable height model accomodates greater ranges of chairs and heights. It is made from high-quality materials that can take use and abuse. Easy height adjustment locks into place automatically.