Smartwool Men's Intraknit Thermal Merino Base Layer 1/4 Zip Archived28Nov25 Sherpa lining

Sherpa lining

which means easier recyclability at end of life

Lightweight in-mold construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable

Standard Sweatband

it's semi fleece lined for extra warmth and comfort

Smartwool Men's Intraknit Thermal Merino Base Layer 1/4 Zip Archived28Nov25 Sherpa liningNew to our innovative Intraknit line is the Men's Intraknit Thermal Merino Base Layer 1 4 Zip. This Smartwool base layer is 3D mapped for a near custom fit and freedom of movement. Its engineered construction helps enhance your performance with a lighter weight and cleaner finish. If you're looking for base layer clothing for cold weather, this one uses Merino Sport yarn that combines the power and benefits of Merino wool with the durability and fast