Unique spinal channel allows back support without pressure on spine. Wrap-around sides that hug your body. Free movement of arms and shoulders. Soothing massage relaxes tired muscles Full-length back support cushion features 10 zones for proper alignment and support in any chair. The effective and unique shape was inspired by the bodys natural posture and designed to fit the curves of your back. Helping to relieve stiffness and pain around the lower back, legs and tailbone area.