This base layer is designed to feel like a second skin, using thermo-stretch fabric and flatlock seams to minimize chafing. It efficiently wicks moisture away from the skin, helping you stay dry and comfortable in any weather-warm in winter and cool in summer. Thermo-stretch fabric offers a snug, second-skin feel Flatlock seams and minimal stitching reduce chafing Moisture-wicking design keeps you dry and comfortable year-round