Smartwool Men's Classic Thermal Merino Long Sleeve Baselayer 1/4 Zip Top

Locks in the heat while keeping you fresh

Conquer harsh winter conditions in absolute comfort with the Smartwool Men's Classic Thermal Merino Long Sleeve Baselayer 1/4 Zip Top. As one of the brand's heaviest and most trusted cold-weather essentials, this performance top is woven from 100% responsibly sourced Merino wool using an advanced interlock knit that optimizes breathability and thermoregulation. The tailored slim fit naturally contours to your body to slide easily beneath outer shells, while specialized shoulder panels and smooth flatlock seams eliminate high-friction zones to protect against chafing under heavy backpack straps. Engineered with a convenient 10-inch front zipper, it allows you to instantly dump heat or seal out bitter drafts during high-intensity skiing, snowboarding, or mountaineering. Thanks to the natural moisture-wicking and odor-resistant properties of pure Merino wool, you can stay dry, fresh, and exceptionally warm from your first chairlift ride to the fireside lounge.