The Under Armour Women's Fly By 2.0 Running Tank is a popular choice for women looking for a sleeveless activewear vest. It is made with UA Microthread fabric, which dries faster and stretches without absorbing sweat. The mesh back panel provides excellent breathability, while the racerback design allows for a full range of motion. This tank top also features reflective details for added visibility in low-light conditions. Whether you're running on the road or hitting the trails, this tank top is a reliable choice.