Smartwool

Warm, soft merino base layer for any cold-weather activity

Smartwool has updated the fit of their men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of their 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.

Formerly known as the Merino 250 Base Layer 1/4 Zip. Packaging may have either name but the product is identical.