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The Smartwool Classic Thermal Merino 1/4 Zip is a heavyweight 100% merino wool base layer top with a quarter-length zipper for venting. It is built for cold-weather skiing, hiking and running, with shoulder panels and flatlock seams that reduce chafing under a pack or shell. It sits at the warm end of Smartwool's line, above the lighter 150 and 200 weights, and competes with other heavyweight merino layers on warmth per ounce rather than on features. Owners value the odor resistance and breathability of merino, though some find the fit boxier and the wool less soft than blends.
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Lowest price we've seen: $130.00 on Nov 10 at Smartwool. Tracked across 4 stores since Nov 10.
Reviewers generally praise the warmth, odor resistance and breathability of this heavyweight merino layer, and many wear it for skiing and winter hiking. Complaints center on fit and durability, with some finding it boxy or less soft than expected.
We've updated the fit of our Men's Merino 250 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 minim
