Mammut Alpine Underwear — The Zip Longsleeve, a piece from Mammut’s “alpine underwear” line, employs polyester and merino wool in a body-mapped pattern that insulates in critical areas and breathes and wicks moisture in other spots. The back is a thin fabric made to better handle sweat. A turtleneck zips high and provides a double-thick fabric for warmth.
The top’s arms are a crisscrossing pattern of seams and swaths that mimic anatomical movement. The fabric has antimicrobial features to avoid odor buildup, letting you go several days between washings. As a bonus, the svelte lines and cuts on this top double for style points — Mammut’s alpine underwear can be worn alone with no issue in public for an edgy, technical look. $80, www.mammut.ch
—Stephen Regenold writes about outdoors gear at www.gearjunkie.com.
