Features: The back belt can be easily stored in a bag. Self-heating herbal back belt is safe and without side effects. Elastic heat belt is suitable for drivers, office workers, athletes, the elderly, women, and other individuals. It uses traditional Chinese medicine heat therapy to generate consistent warmth. A thoughtful 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: 57–70cm (22.44–27.56in) Size L: Height: 25cm (9.84in), Width: 23cm (9.06in), Waist: 70–80cm (27.56–31.50in) Size XL: Height: 25cm (9.84in), Width: 27cm (10.63in), Waist: 80–100cm (31.50–39.37in) Size XXL: Height: 25cm (9.84in), Width: 30cm (11.81in), Waist: 100–123cm (39.37–48.43in) Package Includes: 1 Piece Warm Waist Belt Note: Please allow 1–3cm measurement deviation due to manual measurement. Due to differences between monitor displays, the actual product color may vary slightly from images.