Size : approx length 108-118cm (42-46inches)unstretched; Self-heating pad designed for the waist; High elastic beltgood elasticwear comfortablepaste and firmchangeless form; Can effectively improve blood circulation promote metabolism and clear the meridians enhance immunity; To promote the new supersedes the old. The body regulate the nervous system endocrine activation. Analgesia Quhan dilation of blood vessels; Alleviate the physical local fatigue and pain; Burning excess body fat to achieve some goal of losing weight; A healthy person's daily health care; Have anti-inflammatory and analgesic swelling the role; Easy to use discreet and can be used anywhere any time; According to each person body circumstance decided to matching the length of time; A few skin sensitive populations appears when using skin burning redness is a normal phenomenon will not damage the skin can be worn time shorten