We adventure all year long and no matter the season we know we can rely on merino wool layers.Meet the better-than-ever men's Classic Thermal Merino Base Layer Crew. We’ve 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.

100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance
Fit updated to improve functionality while enhancing aesthetics
Shoulder panels eliminate top shoulder seams
Flatlock seam construction designed to eliminate chafing
Slim fit