Used, some discoloration near armpits. We designed this anti-stink racerback 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 Mobility : Racerback cut for full range of movement Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the garment Fit : Body Skimming, hip length Breathability: Strategically placed Mesh fabric provides ventilation Ventilation: Engineered Mesh is placed in high-sweat areas