Available in 2 heights: 6" and 8". Elevates feet reducing strain on the lower back. Foam: Supportive Polyurethane Foam. Fabric: Cotton. Improves circulation while maintaining the natural body position. Size options allow custom contouring to the body. Spine Reliever Regular Bed Wedge. The bed and leg wedge system provides the ultimate in comfort and support. Designed for people with problem breathing, poor circulation, hiatus hernia, back or neck problems, acid indigestion or reflux. Supportive polyurethane foam with removable, washable cotton cover.