Posture Magic™ Back Support helps reduce back pain, aches and stiffness! Shoulder straps adjust for custom fit and perfect pressure while also helping maintain proper posture alignment. The secret is in the harness that features tiny, massaging nubs that help relieve lower back discomfort by providing stimulation! Improves stability and core strength, too. Perfect for men and women; one size fits most. Adjustable and fits waists up to 55”. Polyester. Hand wash.