Smartwool
Merino 250 Crew Base Layer
Last verified by the Lifetime Picks Editorial Team
Why we picked it
Naturally odor-resistant
Warranty: Lifetime repair (Second Cut)Made in: VietnamSatisfaction: 92%
The merino wool base layer that hikers wear for 5 day backpacking trips without changing. Naturally odor resistant, regulates temperature, and Smartwool replaces holes free under their Second Cut warranty.
Lifetime repair (Second Cut) Made in Vietnam
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Community & Review Summary
4.7/ 5
5,000 Amazon reviews
92%
r/BuyItForLife satisfaction
200+
Total mentions (180 positive)
N/A
Amazon category rank
Price History
Best Price!Jun 25Jun 26
Tracking since May 7, 2026.
Lowest
$39.99
Jun 1
Average
$82.50
Highest
$125.00
May 7
Pros & Cons from Reviews
Pros
- +Naturally odor-resistant
- +Warm when wet
- +Free repair program
- +Soft enough for next-to-skin wear
Cons
- -Premium price
- -Wool requires gentle wash
Independent Video Reviews
Hands-on reviews from independent channels (not the manufacturer), covering what they like and what they do not.