The MILLER 9099 Relief Step Safety Device alleviates the effects of orthostatic intolerance, also known as suspension trauma. If a fall occurs, a person becomes suspended in a harness and remains both vertical and sedentary for a period of time, causing blood to pool in the veins of the legs. Subsequently, blood is restricted to the brain and other major organs that may initially result in unconsciousness. If not rescued promptly, serious injury or death may occur. The Miller Relief Step is designed to provide a short-term solution for alleviating suspension trauma. OSHA states that potentially fatal suspension trauma can occur within minutes while waiting for rescue after a fall. The average fall rescue time is 15 minutes. When used properly, the MILLER Relief Step provides support and enhances blood circulation until rescue, permitting the ability to move and flex leg muscles. Small and lightweight, the Relief Step attaches to any brand full-body harness. Sold Each.