Built to perform, sweat after sweat. The Metal Vent Tech collection, powered by seamless construction, is the ultimate gear for running and training. Designed for Training. Designed to skim the body from chest to waist. More wearing, less washing. Silverescent technology, powered by X-STATIC, inhibits the growth of odour-causing bacteria on the fabric. All: 49% Nylon, 43% Recycled polyester, 4% Elastane, 4% X-static nylon.