The Swiftly Tech collection, powered by seamless construction, is the ultimate gear for running and training. seamless construction Fabric is seamlessly constructed with yarns chosen for movement and shape retention—over time, and when they're soaked in sweat. Lightweight Retains shape features Designed for: Run Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment Reduced chafing : Seamless construction reduces chafing Goodbye, cold ears: Shaped to keep your ears warm and cozy Ventilation: Mesh construction for breathability Fit: Slim fit, race length Recycled polyester: 100% of the polyester in this product is recycled EUC No signs of wear Always hung to dry Size 10 Pet/smoke free home