Lululemon Swiftly Tech Racerback Black. Size 10. Good used condition. 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 Ventilation: Engineered Mesh is placed in high-sweat areas Mobility : Racerback cut for full range of movement Fit : Body Skimming, hip length