Go ahead, get sweaty. The Swiftly Tech collection, powered by seamless construction, is the ultimate gear for running and training. Designed for Running and Training. Skims your body:Meets at your waistband so it won't ride up on long runs or race day. Silverescent technology, powered by X-STATIC, inhibits the growth of odour-causing bacteria on the fabric. Thumbholes. All: 50% Nylon, 44% Recycled polyester, 3% Elastane, 3% X-static nylon.