Smartwool Men's Classic Thermal 250g Merino Baselayer Bottom Black 173696 As one of Smartwool's heaviest

As one of Smartwool's heaviest base layer tops and best base layers for cold weather

Integrated grow system

COMFORTABLE AND DURABLE

Zip Hand Pockets

Smartwool Men's Classic Thermal 250g Merino Baselayer Bottom Black 173696 As one of Smartwool's heaviestWarmest weight 100% Merino wool delivers consistent insulation with natural moisture management, temperature regulation, and odor resistance, all built into a smooth interlock knit that stays comfortable during high output days. Flatlock seams reduce friction, while a Merino lined elastic waistband maintains soft, secure comfort under packs and shells. Cut with a slim, body hugging fit, the Smartwool Mens Classic Thermal 250g Merino Baselayer Bottom