Features: Breathable and comfortable, easy to use and can be used anywhere any time. Hook and loop closure design belt can paste firmly, and is adjustable and comfortable for wearing. It can effectively relieve the pains caused by lumbar disc herniation, lumbar muscle strain and other sickness. Self heating feature could help to promote blood circulation, relieve muscle fatigue, enhance metabolism, improve weakness and adjust the skin color, etc. Very nice daily care tool for the sedentary people, such as office men, drivers, students and more. Specification: Condition: 100% Brand New Material: Cloth Color: Black S Dimensions(L * W): Approx. 102 * 14.5cm / 40.15 * 5.71in M Dimensions(L * W): Approx. 105 * 14.5cm / 41.34 * 5.71in L Dimensions(L * W): Approx. 109 * 14.5cm / 42.91 * 5.71in XL Dimensions(L * W): Approx. 113 * 14.5cm / 44.49 * 5.71in Weight: Approx. 122g Packing List: 1 x Waist Support Note: Please allow slight size error caused by manual measurement. We appreciate for your understanding. .