Classic All-Season Merino Base Layer Bottoms

“I’ve had maybe 20 East Coast winters, and Smartwool was game changer in my household from 2025-2026. Specifically, the all-season merino base layer bottoms. They keep you so warm without adding bulk to your outfits. The solid black/navy/green/greys tend to be priced higher, but I’ve gotten deals on the busy patterns via Backcountry (no one’s going to see them under your 👖, right?)”