The low-profile design can be worn under most aprons throughout the day without tiring the user's shoulders, neck or back. Modeled after award-winning shoulderX technology, the patented frame design conforms to each user's unique body shape while promoting a healthy standing posture. Aircraft-grade aluminum and durable polycarbonate transfer loads along the spine, while a breathable mesh hammock and soft hip padding keep the frame comfortable against the body. Optional fans provide active cooling by drawing air from the cavity of the apron around the legs and blowing it upward toward the head and arms. Heavy radiation aprons can cause injury.