Features: 1. Self-heating and keeping warm: heat-sensitive tourmaline material for self-heating protective clothing. Safety health and environmental protection 2. 4 Support plate stable and not deformed: 4 pieces of support stable and not easy to deform. The arc adapts to the waist curve supports comfortable and stable and provides 360-degree three-dimensional care. 3. Built-in 25 high-energy magnets strong magnets have biological effects on the human body continuously release magnetic lines of force provide magnetic energy and refuse back pain 4. Heating tape Heating tape: It can provide heat therapy for back pain muscle soreness spasm relief and injury recovery. It can even be worn on the shoulders neck waist elbows ankles knees or wrists for pain relief or relaxation. 5. Suitable use: the self-heating back waist support is used to protrude the lumbar vertebrae sciatica waist that needs to be kept warm for long periods of sitting such as drivers or office workers athletes or people who regularly do sports . Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: As picture show includes: Back Support "