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: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.