Features:Delivers continuous gentle warmth， designed specifically to ease lower back pain.Penetration of heat， relaxes the muscles and increases blood flow.The increased blood flow helps wash away substances that cause pain.The back wrap is discreet， comfortable and non-restrictive.Specifications:Material: LeatherColor: As the picture ( randomly delivery)Free size， fits most ( waist: 28.8 - 35.4inch )Package list:1 * Waist Brace