Features: 1. Made of Steel plate and self-heating cloth, this waist support belt is comfortable without affecting your work, study and so on. 2. Ergonomics design to fit for the waist curve, which will ease pressure on back. And it will provide support and protect your lumbar 3. Once you wear it, you could quickly feel its effect. Plus, to ensure your security, it will become heat a little slowly, so it takes about 30 minutes to feel the obvious heat heating . 4. Suitable for people who suffer from lumbar back pain, sciatica nerve pain, arthritis, soft tissue damage. 5. Before fixing this waist support on the surface of your skin, it is suggested to use the clean wet towel to wipe its center heating part wet. The time of wearing it depends on the body situation of each person. Additionally, if you don't want to wipe the waist belt firstly, it could still do the job, however, it will come with a longer warming-up time. 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: Material: steel plate+ heating cloth+elasticity mouth mercerized cotton+ magnets includes: 1x Self-heating Magnetic Lumbar Support