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Meet the better-than-ever Smartwool Men’s Classic Thermal Merino Base Layer Crew. This 100% Merino wool fan favorite has been updated with new colors and a refined fit to improve functionality while enhancing aesthetics. Shoulder panels eliminate top shoulder seams, while 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.
Because you want warmth, comfort, and performance in cold conditions. The Smartwool Men’s Classic Thermal Merino Base Layer Crew combines the natural benefits of Merino wool with a slim fit, flatlock seams, and breathable midweight fabric—making it the perfect choice for skiing, hiking, climbing, biking, and all your winter adventures.


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