Aeroswift Singlet Running Size: S Product Description: Brand/Manufacturer: NIKE Nike Product Name: Nike DFADV Aeroswift Singlet Men's Running Wear Tank Top Aeroswift S Singlet Material: 100% Polyester Lightweight and easy to move in, a design that revolutionizes racing. I ordered the wrong size, so I am selling it. I intended to wear it, so there are no tags.