Features:1. Made of high quality material, which is safe and comfortable to wear2. The soft self-adhesive pad with high elasticity that is easy to take on and off.3. Adopting self-heating material which will help to correct posture.4. Effectively help to relieve physical local fatigue and pain, waist care.5. A good choice for your parents, friends or yourself.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement.Specification:Type: Self-heating Magnetic Tourmaline Belt Material: steel plate, SBR, magnetsSize:S: length 100cm, suitable waist: about 23.62-27.56inM: length 105cm, suitable waist: about 28.87-34.12inL: length 110cm, suitable waist: about 35.43-39.37inXL: length 115cm, suitable waist: about 40.68-44.62inSuitable for:1.People who has health problem like protrusion of lumbar vertebral disc.2.People whose physical local need keeping warm. (Recommend wear it under thin garment)3.People who work sedentarily or in a prolonged standing position such as drivers or office workers.4.Athletes or people doing regular exercise.Usage:1. Apply on the skin directly.2. After 15 minutes you could feel the heat(If you could not feel the heat, you could just wipe the surface of the insoles with wet towel.)3. Twice a day, about 3 hours for each time(do not use when sleeping)4. It is normal that some people with sensitive skin may feel burn or skin turns red. It would hurt skin, could shorten use time according to individual circumstance.Below crowd please use it cautiously:1. Pregnant women and children please do not use this product.2. Please stop using if you have a high fevers or damaged skin.3. Not recommended for people with skin allergies or skin temperature sensory disturbance.4. Patients with acute soft tissue impairment, please don't use.5. Please use with caution under the guidance of doctors:. Patients with serious trauma, high blood pressures or any other disease.6. Prohibit use People who fitted with metal stents and other electronic devices inside body.Note:1. Use cold water hand washing.2. Don't use the washing machine dehydration, hot water washing is not available. 3. If the product has any problem,please contact us first Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store