For a well-ventilated workout, this women's techfit tank top breathes deeply with a mesh and Climacool construction that keeps air circulating while you step up your game. The oblong cutout detail along the back of this close-fitting tank top lets you show a hint of color if layered over a sports bra. With flat seams to keep friction to a minimum, plus UPF 50+ UV protection for when your training takes you outdoors. Cotton. Ventilated Climacool keeps you cool and dry. Techfit focuses your muscles' energy to generate maximum explosive power, acceleration and long-term endurance. Racer back: Mesh back insert: Mid-back cutout. Longer length keeps you covered when you lift your arms. UPF 50+ UV Protection: Fitted fit.