Feature:The lower back tracion device transfers the weight of your spine, decompress the spine to restore the disc to normalReduce pain and stress on pinched nervesImprove the nutritional flow of your spineHelp to relieve pressure off pinched nerves, perfect health care tool for easy usage.No pills, no appointments, long-lasting back pain relief.Specification:21 * 18 * 7.5 CM Material:Outer layer: PU;Inner Layer: Cotton;Innerlayer of air inflation: TPU;Note:The pump will make a sound of are leakage when the belt is fully inflated, the stopped pumping and remove itThis belt can't be immersed into water to wash it, It can be wiped with water or alcoholThis belt is also to avoid direct sunlight and heat, so state to put it in a cool,dry place after using.Package:1 x Lumbar Traction belt1 x Hand pump1 x Extension belt1 x Use manual