We designed this anti-stink long-sleeve layer with running (and sweating) in mind. 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 No chafe: Seamless construction in the body minimizes chafing Silverescent® technology: Powered by X-STATIC®, it inhibits the growth of odour-causing bacteria on the top Relaxed fit, hip length: Layers easily and gives you room to breathe Ventilation: Engineered Mesh is placed in high-sweat areas