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 heat compression technology to generate consistent warmth. This product makes 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 for selection) Size M: Height: 25 cm (9.84 inches) Width: 20 cm (7.87 inches) Waist: 57–70 cm (22.44–27.56 inches) Size L: Height: 25 cm (9.84 inches) Width: 23 cm (9.06 inches) Waist: 70–80 cm (27.56–31.50 inches) Size XL: Height: 25 cm (9.84 inches) Width: 27 cm (10.63 inches) Waist: 80–100 cm (31.50–39.37 inches) Size XXL: Height: 25 cm (9.84 inches) Width: 30 cm (11.81 inches) Waist: 100–123 cm (39.37–48.43 inches) Package Includes: 1 Piece Warm Waistband Note: Please allow 1–3 cm variation due to manual measurement. Due to differences in monitor displays, the actual color of the item may vary slightly from the image.