Women's 300 MerinoFine™ Polar Long Sleeve Half Zip

The half zip is a lifesaver when the temperature dips—I can vent a bit without fully stripping layers on a hike. The 15.5-micron merino is noticeably finer than my old base layers, so it's soft against the skin all day long. Definitely warm enough for single-digit mornings, and it still breathes whe

I wore this on a freezing morning walk and the half zip made it easy to vent heat without stopping to strip layers. The heavyweight feel is substantial, yet the wool against my skin never itched once.

The 15.5-micron wool is noticeably finer than my old base layers—no itch at all even after a full day of wear. It’s heavyweight but somehow breathes well when I’m moving, and the half zip adds a little style under a flannel.