Better performance – The incredible comfort, perfect stretch, and lightweight feel of this sports top allow you to go further and faster. Ultimate freedom – With a skinny racerback construction for added range of motion, this tank top for women won't hold you back. Functional fabric – The UA Microthread fabric of this training top dries fast, won't cling, stretches without absorbing sweat and is recyclable. Practical details – The high-quality muscle shirt features mesh panels for added ventilation and reflective details for low-light runs. Material and fit – Under Armour Womens UA Launch Singlet, lightweight women's tank top, material: 94% Polyester, 6% Elasterell.