Your potential-unlocked. The Metal Vent Tech collection, powered by seamless construction, minimizes distractions from chafe and sweat so you can stay laser focused. Designed for Running and 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: 53% Nylon, 40% Recycled polyester, 4% Elastane, 3% X-static nylon.