When the temperature drops and adventure calls, the Smartwool Classic Thermal Merino Base Layer Crew delivers the performance you need to stay comfortable mile after mile. Crafted from 100% ZQ Merino wool, this men's thermal base layer naturally wicks moisture, regulates body temperature, and resists odors even during multi-day backcountry trips. The slim-fitting design hugs your body's contours for optimal layering while flatlock seam construction with offset placement eliminates chafing during high-output activities like skiing, climbing, or winter hiking. Whether you're skinning up a mountain or grinding through a long bike ride in freezing conditions, this merino wool base layer keeps you dry, warm, and focused on the trail ahead instead of what you're wearing underneath.
