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 ...

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 ...

But some long underwear is actually so thinly woven that you will barely feel it beneath your regular clothes ... who calls her Smartwool base layers “much softer and cozier than others I ...

While technical base layers is something they’ve always done well, not to mention their mid-layer and fashion-forward outerwear developments in recent years, Smartwool has a few new base layer options ...