Lightweight and comfortable, this specially designed back support has two Biofeedbac™ sensory pads for therapeutic muscle pressure and a center panel to enhance posture without restricting movement. Helps relieve muscle tension and ease pain. The slim design fits comfortably under clothing and is great for men and women. Magnet-free and pacemaker-safe. Polyester, rubber and Elastane. Great for men and women. Fits waists from 22" to 60".