This is Smartwool's women's Classic Thermal Merino Base Layer 1/4 Zip, one of the heaviest base layer tops they make, now with an improved fit. It's 100% merino wool in a midweight 250 g/m2 fabric, so it stays warm and breathable on the coldest days.
Merino is our go to first layer under ski gear. This heavy weight is the one we hand people who run cold.
Cold resort days, winter hiking and layering under a shell. Made for powder days at Monarch Mountain.
