Lumbar Support Belt With Self HeatingPad Back Waist Support AdjustableWaist Support BraceLumbar Massage Band Features 1.5 steel plate support, two-way tension fixed, uniform force at waist, ease waist fatigue. 2.Ergonomic reverse C design,fit your waist better and add more comfort; 3.Comfortable and skin-friendlymaterial, breathable and not stuffy, ; 4.Yshapedelastic bandensures fixed pressureon waist; 5.Magic sticky button pastetostick firmly; 6.Comfortable waist protectionto help keeplumbar straight. Specifications Material: spandex Color: silver gray Dimensions: 35.4*9.1*5.5inch/ 90*23*14cm Weight: S--16.9oz/480g; M--17.64oz/500g SIZE SPECIFICATIONS Size Width Length Waist Circumference S 23CM 90CM 23.6-27.6inch M 23CM 100CM 28.9-31.5inch L 23CM 110CM 32.8-35.4inch XL 23CM 120CM 36.7-43.3inch Package list: 1 x LumbarBack Support Brace 1 x Ventilate Pad with String Bag 1 x Warm Velvet Pad 1 x Self Heating Pad