Smartwool Classic All-Season Merino Base Layer Bottom Men's (Iron Heather)

A year-round favorite, our Merino 150 Base Layer Bottoms work hard to keep you comfortable everywhere, from the ski lifts to the campsite. With an

Men's Classic All-Season Merino Base Layer Bottom - Iron Heather - (Past Season)

The Smartwool Men's Merino 250 Base Layer 1/4 Zip has an updated fit to improve functionality while also enhancing aesthetics. As one of our heaviest base layer tops and best base layers for cold weather, this garment uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction to help minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.

Smartwool Classic All-Season Merino Base Layer 1/4 Zip Men's (Black)

Smartwool Intraknit Thermal Merino Base Layer Bottoms - Men's

Smartwool Classic All-Season Merino Base Layer 3/4 Bottom - Men's, Merino Bottoms

Men's Tops Altitude Sports

Men's Base Layer Tops

Smartwool Classic All-Season Merino Base Layer Long Sleeve

Smartwool Mens Classic All-Season Merino Base Layer Long-Sleeve

Smartwool Classic All-Season Merino Base Layer Long Sleeve

Smartwool Leginsy Classic All Seasons Merino Base Layer Bottom

Men's Baselayer Sale - Smartwool, Icebreaker & Patagonia

Smartwool CLASSIC ALL-SEASON MERINO BASE LAYER 1/4 ZIP - Long

Smartwool Classic All-Season Merino Base Layer Bottom - Men's and other great base layers for skiing, camping, hiking, and mountaineering at

Classic All-Season Merino Base Layer Bottom - Men's