OSHA states that potentially fatal suspension trauma can occur within minutes while waiting for rescue after a fall. Average fall rescue time is 15 minutes. When used, the Relief Step Safety Device provides support and enhances blood circulation until rescue - permitting the ability to move and flex leg muscles. Small and lightweight, the Relief Step Safety Device attaches to any brand full-body harness. Utilizing two (2) Relief Steps (one for each leg/foot) assures greater comfort until rescue is completed.