This a brand new Nike singlet with tags. Any runners out there know the importance of wearing gear that is light weight, keeps dry and cool. Let me know if you have any questions or want to make an offer :). I have a small and a medium. Lightweight Cooling: Nike AeroSwift technology integrates innovation features and materials with precision fit to deliver exceptional mobility and lightweight comfort to help you at your fastest from start to finish. Dropped back hem helps keep you covered through your stride. Wide armholes let you move naturally. Flat seams feel smooth against your skin. Zonal cooling and update aerated openings in high-heat zones, offer optimal breathability.