Go ahead, get sweaty. The Swiftly Tech collection, powered by seamless construction, is the ultimate gear for running and training. Designed for Run. Skims your body:Sits below the waistband for moderate, everyday coverage. Silverescent technology, powered by X-STATIC, inhibits the growth of odour-causing bacteria on the fabric. Thumbholes. All: 54% Nylon, 40% Recycled polyester, 3% Elastane, 3% X-static nylon.