Ergodyne - EGO40206 6435 Base Layer Long Sleeve Shirt is a medium-weight, comfortable layer that provides warmth in cold conditions. Stretch fit does not restrict movements. Material avoids causing you to overheat yet warms your core temperature. Easily layer under sweatshirts and jackets because this shirt does not bulk or add unnecessary weight. Tuck the shirt into pants or overalls with the long tail hem. To enhance breathability and mobility, design fits looser on the skin. Raglan sleeves and wider underarms allow a full range of motion without having uncomfortable material rubbing the skin. Flatlock seams and no added tags eliminate irritation and chafing. Place your thumbs in the designated loops to keep the sleeves in place and the wind out. Stay dry and warm with the moisture-wicking technology that absorbs sweat. Remain fresh all day with the anti-odor treatment that combats intense smells. Machine-wash to easily wear the next day.