This 1/4 Zip is made with soft-touch stretch fabric to allow for free range of movement at the same time as keeping you as comfy as possible. The zip collar allows for extra airflow when you decide to take your workout up a gear. Fabric: 81% viscose 14% polyester 5% elastane MP Men's Performance 1/4 Zip - Cobalt/Black - XS Blue male Viscose/Polyester/Elastane.