Made with 100% Merino wool for natural sweat management, odor-resistance, and temperature regulation this is one of Smartwool's heaviest baselayer tops for cold weather sports.

Why we like it:

A heavy baselayer with a zip neckline this can be worn on its own or layered over a thinner baselayer as a light sweater adding range to our sports wardrobe without having to add extra pieces to the drawers.

Features and Functions:

One of the heavier base layer tops and the best base layer for cold weather this zip neck uses 100% responsibly sourced Merino wool, shoulder panels, and a flatlock seam construction that helps to minimize chafing. Designed to keep you comfortable and temperature-regulated as you enjoy high-intensity skiing, hiking, running, and more. Merino wool provides natural moisture management, temperature regulation, and odor resistance in this comfortable interlock knit. Made in Vietnam: 100% Wool-Merino.

Fit and Sizing:

A slim fit if you want more room, size up.

Bottom Line:

A heavier baselayer made from 100% Merino wool and tailored to minimize chaffing with natural moisture management and temperature control paired with tailoring and flat-seam construction to minimize chaffingthe Men's Classic Thermal Merino Base Layer 1/4 Zip is a cold weather thermal for all your high energy pursuits.