One Size for 29-49Waist: Back support belt with extension pads for waists 29-49 inches. To measure your waist correctly, measure the size of the belly button.Enjoy anytime, anywhere: Simple to use and comfortable to wear. Whether working, exercising, doing housework, etc., the waist support belt will not get in the way. Enjoy life and forget about pain.Powerful Support: There are multiple air columns on the Lumbar support belt, after inflation, it supports the lower waist 360. Effectively relieve back pain caused by lumbar disc herniation, lumbar muscle strain, lumbar nerve compression, etc.Back Pain Relief: The decompression back belt provides effective and comfortable lumbar traction, corrects the spine posture, prevents excessive scoliosis, relaxes the lumbar muscles and relieves pain.Ergonomic Design: The reverse C-shaped design of the lumbar support is ergonomic. Supports the lower back and helps the spine restore a healthy physiological curvature.