Like the socks this brand built its reputation on, the Smartwool Merino 150 base layer uses Merino wool – a material that's often used for outdoor apparel, being breathable yet warm, and ...
This set is 150 GSM, meaning the fabric is woven ... For more extreme winter conditions, level up to Smartwool’s 250 GSM merino wool base layers. Wool and silk base layers are pricey, and ...
Smartwool established a reputation for its high-performance merino wool base layers — offering unbeatable warmth, breathability, and moisture-wicking properties. The brand has since built on the ...
We tested the best men's base layers of 2025 with options for every budget. Top picks include Ibex, Patagonia, SmartWool, and ...