The Carhartt Women's Base Force Heavyweight Crew top for extreme cold weather works as hard as you do to keep you warm, and dry on the coldest days. This 266 gsm/7.7 oz 95% polyester 5% spandex thermal features. This shirt features a mock-neck collar with a quarter-zip to let out heat when working hard. Smooth flat-lock seams and tag less label enhance comfort. Rugged Flex fabric moves with you. FastDry technology wicks away sweat and keeps you odor free throughout the work day. The concealed thumb loops keep your sleeves in place when you put on another layer. From the jobsite to weekend projects to rips on the snowmobile this women's heavyweight thermal crew offers easy-wearing warmth in those extremely cold months.