We designed this anti-stink long-sleeve layer with running (and sweating) in mind. Silverescent® technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on the garment. seamless construction No side seams—seamless construction in the body minimizes chafing. lightweight no side seams four-way stretch silverescent® technology Silverescent® technology, powered by X-STATIC®, inhibits the growth of odour-causing bacteria on this garment anti-stink features Designed for: Run, train No chafe: Seamless construction in the body minimizes chafing Thumbholes: Help keep your sleeves in place and hands warm Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the top Fit : Body Skimming, hip length Breathability: Strategically placed Mesh fabric provides ventilation