The UNDER ARMOUR® Women's ColdGear® Thermo 1/4-zip top is built to help you train in the coldest temps, thanks to an exclusive hex-patterned fabric that traps body heat for maximum warmth without the bulk. Moisture-wicking ColdGear® and anti-microbial technologies keep you dry, light and smelling fresh, while thumbholes keep the sleeves secure and prevent heat from escaping.