You can't go wrong with a baselayer that's made from 100% merino wool. The Smartwool NTS Mid 250 Zip Top is here to keep you super warm and comfortable, whether
Smartwool Merino 250 Base Layer Quarter-Zip Top - Men's
Men's Intraknit Merino 250 Thermal 1/4 Zip
Merino 250 Baselayer Pattern 1/4-Zip Top - Men's, Rhythmic Red
Smartwool Men's Classic Thermal Merino250 Base Layer 1/4 Zip
Men's Merino 250 Baselayer 1/4 Zip Deep Navy
Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's
SMARTWOOL Men's Merino 250 Base Layer 1/4-Zip Pullover - Bob's Stores
Men's Classic Thermal Merino Base Layer 1/4 Zip
Smartwool Classic Thermal Merino Quarter-Zip Base Layer Top