Mammut All-Year Long Underwear Bottoms - Men's


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The right fabric for the right place is the logic behind Mammut’s revolutionary Symbitech technology. There are no better garments than baselayers to exploit the properties of merino wool and polyester microfibers. The Mammut All-Year Long underwear bottoms do this by dividing the lower body into zones. Then Mammut’s fabric engineers in cooperation with climbers, matched the sweat producing, heat sensitive and insulating needs of the body to the best combination of these textiles. The results are amazing. You can wear the All-Year long johns on your mid-winter approach to a backcountry ice climb or during your multi-day speed hike in the summer. Mammut’s All-year Long Underwear bottoms live up to its versatile, symbiotic nature.


  • Fabrics: Light and mid weight merino wool and polyester blends and polyester
  • Fabric composition: 22% merino wool, 78% polyester or 20% merino wool, 80% polyester or 100% polyester microfiber.
  • Body Mapping design determines location, blend, structure and weight of the fabrics
  • Antimicrobial treatment
  • Contour cut

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Review Summary

5 out of 5

1 Reviews

1 Ratings & Reviews


Pretty awesome
December 12, 2012

I was searching for bottoms like this to wear under normal pants in cold weather for an upcoming vacation. I was nervous to purchase because I'm a 6'2" guy who is also extremely thin. And it's hard to find things that fit my waste and fit my length. This managed both perfectly.

Also Available

Mammut Men's All-Year Long Underwear Bottoms Photo

Black, Black/ Cyan and Blue.

Available sizes, while supplies last, include size xs, size small, size medium, size large, size extra large and size extra extra large: xs, s, m, l, xl, xxl.

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