Materials:PU leather+elastic band +heat cloth+magnet Color:black size M:Tile length about 100cm,suitable waistline 70-80cm ; L:Tile length about about 106cm,suitable waistline 80-90cm ; XL:Tile length about 113cm,suitable waistline 90-110cm ; waist support width 17cm For the crowd:Waist injured,Fitness bodybuilding,Waist daily protector,abdominal cold,stomach cold and pain,Lumbar disc herniation feature:breathable and high elastic,providing the waist fixed effect, prevent sports injuries,Supporting the lumbar spine, reducing the pressure during exercise,Auxiliary injured waist to speed recovery,keeping the waist warm,Especially the lumbar and stomach warm in winter,women give birth abdomen protector and bodybuilding.the heat pad can be removed,so it can be usd four seasons