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 Chinese medicine moxibustion 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: DerongColor: 5 options availableType: 2 options availableSize: 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: 5770 cm (22.4427.56 inches)Size L:Height: 25 cm (9.84 inches)Width: 23 cm (9.06 inches)Waist: 7080 cm (27.5631.50 inches)Size XL:Height: 25 cm (9.84 inches)Width: 27 cm (10.63 inches)Waist: 80100 cm (31.5039.37 inches)Size XXL:Height: 25 cm (9.84 inches)Width: 30 cm (11.81 inches)Waist: 100123 cm (39.3748.43 inches)Package Includes: 1 Piece Warm WaistbandNote: Please allow 13 cm variation due to manual measurement. Due to differences in monitor displays, the actual color of the item may vary slightly from the image.