We designed this anti-stink, long-sleeve layer with running (and sweating) in mind. features Designed for: Run No chafe: Seamless construction in the body minimizes chafing Thumbholes: Help keep your sleeves in place and hands warm Fit : Body Skimming, hip length Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment