The binder is made of imported medical fabrics,, with good breathability and moisture wicking function, always keep your back dry, give you a comfortable wearing experience. Feel natural and comfortable, very breathable and lightweight. EXCELLENT DESIGN: Designed with nylon spandex blend double bonding, flat appearance, even tissue distribution, comfortable to wear. Special sewing method is used to press the edges at the bottom, which won't move or roll up when wearing, making the chest binder more snug and comfortable, perfect for tank tops or T-shirts. THREE LAYERS: Brand new three-layer structure, the lower part of the back of the chest binders has a two-layer structure, which creates tension and pull on the front and compresses the chest more effectively, the fabric has excellent breathability.