Most outdoors stores don’t even stock merino wool underwear these days, but it is the hypereffective choice. Pure Merino wool provides a combination of softness and thermal regulation.
Wool insulates even when wet and helps regulate body temperature while absorbing and evaporating moisture to eliminate bacteria and odor.
A women’s version is also available.
Available from: Campmor ($30)
Read more! Related stories:
- The Most Efficient Material For Cold Weather: Merino Wool
- From The Meta-Efficient Labs: Most Optimal Comforter Material: Organic Merino Wool
- Icebreaker: Efficient Wool T-Shirts For Warm Weather

