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We've refined the fit of our Men's Classic Thermal Merino Base Layer 1/4 Zip to enhance functionality and aesthetics. Serving as one of our most substantial base layer tops and an excellent choice for cold weather, this garment is crafted from 100% responsibly sourced Merino wool. It features shoulder panels and a flatlock seam construction, minimizing chafing and ensuring comfort and temperature regulation during high-intensity activities like skiing, hiking, running, and more.

Technical Features

Slim Fit
Constructed from 100% Merino wool fabric with an interlock knit, providing enhanced comfort, breathability, thermoregulation, and odor resistance
Updated fit to enhance functionality and aesthetics
Shoulder panels eliminate top shoulder seams
Flatlock seam construction strategically minimizes chafing
10' (25 cm) center front zipper with a semi-locking slider
Knit in Vietnam: 100% Merino Wool. Exclusive Of Decoration

Smartwool Men's Classic Thermal 250g Merino 1/4 Zip Baselayer Crew Top Black Colour Shift

Smartwool Men's Classic Thermal Merino 1/4 Zip Base Layer Pewter Blue Heather