Meet the Women's Classic Thermal Merino Base Layer Colorblock Crew, Boxed. This 100% Merino wool fan-favorite combines the moisture management, temperature regulation, and odor resistance of Merino with the comfort of an interlock knit. Its flatlock seam construction helps prevent chafing, and the slim fit follows the contours of the body for maximum comfort every way you move. Add one of our best cold-weather base layers to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking.