Smartwool Smartwool Men's Classic Thermal Merino Base Layer Crew

An updated 100% Merino wool fan favorite with new fit to improve functionality yet maintain exceptional performance as a base layer.

Smartwool - Men's Classic Thermal Merino Base Layer 1/4 Zip - Running Lab

Smartwool Men's Classic Thermal Merino 250 Crew Base Layer Top - PRFO Sports

Smartwool Men's Classic Thermal Merino Base Layer Crew - Laguna Blue Heather

Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip

Men's Classic Thermal Merino Base Layer Crew - Running Lab

Smartwool Men's Classic Thermal Merino Base Layer 1/4 Zip

Smartwool Mens Classic Thermal Merino Base Layer Crew

Whole Earth Provision Co. SMARTWOOL Smartwool Women's Classic Thermal Merino Base Layer Crew

Whole Earth Provision Co. SMARTWOOL Smartwool Men's Classic

Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip

Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip

Women's Classic Thermal Merino Base Layer Crew