Nike Men's Dri-Fit Element Sphere 1/2 Zip Running Shirt 93% Polyester/7% Spandex Fabric: 93% Polyester 7% Spandex Thermal fabric that helps insulate your body during cold-weather activities Thumbhole cuffs and fold-over mittens for warmth and enhanced fit Dri-Fit to help keep you dry and comfortable Mock neck for warmth and coverage