Product Detail: 1.100% polyester mesh cloth; Good air permeability and wicking capability; UV-proof , not easily out of shape. 2.Fine workmanship and double lockstitching keep the shape. And the elastic rubber strap protects you from the air coming in when exercising. 3.With double stitching and three individual small pockets, the storage pocket is more convenient and protect your gear from the sweat. 4.The longer back design could cover your back all the time when you are riding. 5.Quality high pressure sponge absorbs the shock during riding and protects your hip and reproductive system. The uneven surface improve the effect of wicking. 6.The elasticity makes it convenient to wear and take off. 7.The design bases on human engineering . The anti-slip strap prevents friction and reduces the energy loss.