12 Best Merino Wool Base Layers (September 2026) Reviews
I spent 90 days testing merino wool base layers across the Pacific Northwest, putting 12 different options through real backcountry conditions. Rain, snow, multi-day trips, high-output trail runs, and slow winter hikes — all of it. By the end, I had a clear picture of which pieces actually deliver on the promise of warmth without … Read more