![Smartwool Men's Classic Thermal Merino Base Layer 1/4 Zip Black](http://jaxgoods.com/cdn/shop/products/66-646740-6044913-image-1620463_640x640.jpg?v=1683235770)
Men's Classic Thermal Merino Base Layer 1/4 Zip
We've updated the fit of our Men's Classic Thermal Merino Base Layer 1/4 Zip 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.