Jun 10, 2025 · We took 42 base layers from Arc'teryx, Ridge Merino, Smartwool, Black Diamond, Icebreaker, Patagonia, and others to extremes during months of real-world testing to uncover the top …

Aug 19, 2025 · The Icebreaker Merino 200 Oasis (men’s / women’s) was our choice as a hiking and sleeping base layer over 500 miles on the Colorado Trail. It’s versatile, 100% merino wool, a touch …

Jan 22, 2026 · This Merino.tech Women’s Merino Base Layer Set includes a midweight top, leggings, and Merino hiking socks for full-body warmth and comfort. Made from 100% superfine 17.5-micron …

6 days ago · Merino wool base layers are the foundation of any effective cold-weather clothing system. After testing dozens of options over three winter seasons and logging more than 200 days wearing …

5 days ago · I’ve tested merino base layers in conditions down to -40°F, and top performers like Meriwool’s Midweight Thermal and Iguana’s 100% Merino sets deliver exceptional warmth-to-weight …

4 days ago · There's a lot of merino base layers out there, but this one balanced all the features we wanted the best, with a fair price. The Smartwool Classic All Season is a versatile and flattering …

Jan 10, 2026 · Stay dry, warm and odor-free on the trail with the best Merino wool base layers for hiking of 2026 — top picks for comfort in any season.

May 18, 2025 · Below is my guide to the best wool base layers for cold hikes, including top and bottom options that deliver warmth without bulk. 1. Smartwool Merino 250 Base Layer Crew. Smartwool’s …

Nov 14, 2025 · If you’re looking for the best merino wool base layers to stay warm and cozy this winter, I recommend checking out options made from 100% superfine merino wool. These layers are soft, itch …

Jan 20, 2026 · We test base layers for performance, comfort, breathability, versatility and durability. We find out if their features and designs work in demanding real world environments, and also look at …