Seat wedges are designed to relieve and help prevent lower back pain. The tapered angle of the wedges encourage correct posture. Bed and leg wedge systems provide the ultimate in comfort and support. Designed for people with problem breathing, poor circulation, hiatal hernia, back or neck problems, acid indigestion or reflux. The wedge system enables the user to get the body into a Zero-Gravity position, relieving stress and strain on the lower back.