Correction of hunchback & posture corrector, adjustable back support, comfortable and breathable. Size chart:Average code is adjustable. Material:Chloroprene rubber, nylon Product description:There are 2 auxiliary support plates on the strap, which provide strong support from all angles and gently disperse the tension you need, so that you can keep the alignment and stability without hurting your back. You can pull your shoulders back to where they belong, and you don't have to struggle to get there. Effectively relieve shoulder, neck or upper back pain, and help hunchback and sagging. Made of high quality and light neoprene, it won't sweat, spread pressure points, and won't cut your armpits. With extra underarm cushion, you can slide to a comfortable position and reduce friction. Fully adjustable, strong hook and loop sealing, PU splicing, easy to wear and manually adjustable. Our posture corrector adds a separate extension belt, so that the product can adapt to a wider range of body types.