Features: The back belt can be easily stored in a bag. The self-heating back belt is safe and has no side effects. The elastic heat belt is suitable for drivers, office workers, athletes, the elderly, women, and other individuals. It uses traditional heat therapy to continuously generate warmth. A great gift for friends, family members, or colleagues during holidays such as Christmas. Specifications: Component: Fabric material Color: 5 options available Type: 2 options available Size: Medium / Large / XL / XXL (Chinese sizing; please refer to the size chart) Size M: Height: 25cm (9.84in), Width: 20cm (7.87in), Waist: 5770cm (22.4427.56in) Size L: Height: 25cm (9.84in), Width: 23cm (9.06in), Waist: 7080cm (27.5631.50in) Size XL: Height: 25cm (9.84in), Width: 27cm (10.63in), Waist: 80100cm (31.5039.37in) Size XXL: Height: 25cm (9.84in), Width: 30cm (11.81in), Waist: 100123cm (39.3748.43in) Package Includes: 1 pc Warm Waistband Note: Please allow 13cm measurement variation due to manual measuring. Due to differences between monitor displays, the image may not reflect the actual product color.