Smartwool Men's Classic Thermal Merino Base Layer Colorblock Crew champ Your go-to lightweight crew neck

Your go-to lightweight crew neck layering top for cold-weather workouts

But his most formidable opponent is still that damn F5

yet lightweight

while its antimicrobial properties are at work

and cleaning

Smartwool Men's Classic Thermal Merino Base Layer Colorblock Crew champ Your go-to lightweight crew neckThe Men's Classic Thermal Merino Base Layer Colorblock Crew features 100% Merino wool made with a flatlock seam construction and offset shoulder and side seams designed for enhanced comfort, breathability , thermoregulation, and odor resistance. From hiking to running and skiing, this base layer brings consistent comfort, plus reliable warmth and durability, for every winter activity.