Smartwool's Men's Classic Thermal Merino Base Layer Colorblock Crew features 100% responsibly sourced Merino wool made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. With shoulder panels and a flatlock seam construction, this base layer brings consistent comfort, as well as reliable warmth and durability, to winter hiking, running, and skiing.

• Slim fit
• 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation and odor resistance
• Flatlock seam construction and offset shoulder and side seams designed to increase comfort and minimize chafing
• Side seams wrap to front for body-enhancing fit