Whether we're covering miles in the middle of winter on the road or trail, the Craft Active Intensity Zip Top keeps us warm and comfortable through high-output activities. Its ultrasoft synthetic fabric wicks sweat away from the body to prevent that clammy chill that can happen too easily when the temperatures drop. A form-fit with body-mapped seams ensures the top moves with us, not against us, through even the most dynamic activities like cross country skiing and intense training.