Zpacks Octa Fleece Thermal Bottoms sawyer micro Always a favorite of the

Always a favorite of the ultralight elite

A lightly elastic waist with a drawcord provides a clean

and packs down so small it can easily be tucked in your day pack just in case

With this pot

*The length has been increased and is in effect across all sizes as of November 2025 thanks to feedback

Zpacks Octa Fleece Thermal Bottoms sawyer micro Always a favorite of theZpacks Octa Fleece Thermal Bottoms beat the warmth and weight of all other long underwear in their class. Designed to be worn under your hiking pants in frigid weather, under shorts in cool weather, or worn as an ultralight sleep layer, these leggings are unmatched when ounces count. Octa Fleece features a soft, fluffy interior that traps warmth and keeps you cozy, and an abrasion resistant exterior that withstands wear and tear. Check out the rest of