Hyperwarm Technology: Designed to act as a thermal base layer that retains body heat while keeping you dry. Dri-FIT Fabric: Utilizes a high-performance microfiber construction to wick moisture away from the skin for quick evaporation.Functional Elements: Features a 1/2 zip mock neck for adjustable ventilation, a fitted profile, and functional thumbholes on the cuffs to keep sleeves securely in place. 88% polyester 12% Spandex, Pink Nike Swoosh on Arm. Please see measurements in photos for correct size.