Meet the better-than-ever Men's Classic Thermal Merino Base Layer Crew. Smartwool updated this 100% Merino wool fan favorite with new colors and a new fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams, and a flatlock seam construction helps prevent chafing. Add one of Smartwool's best base layers for cold weather to your winter wardrobe and experience the difference the next time you go skiing, hiking, climbing, or biking. FeaturesFlatlock seam construction designed to minimize chafingShoulder panels eliminate top shoulder seamsFit updated to improve functionality while enhancing aesthetics100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance