Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Men's
2025 Smartwool Baselayer Top
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 minimize chafing as well as help keep you comfortable and temperature regulated as you enjoy high-intensity skiing, hiking, running, and more.
- Slim Fit
- 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance
- Fit updated to improve functionality while enhancing aesthetics
- Shoulder panels eliminate top shoulder seams
- Flatlock seam construction designed to minimize chafing
- 10' (25 cm) center front zipper semi-locking slider
- Knit in Vietnam: 100% Merino Wool. Exclusive Of Decoration
- Garment Weight: 298 g = 10.51 oz
- Style: SW016355
