Classic Thermal 1/4 Zip Crew

Cold air isn’t the problem. Bad layers are.

The Smartwool Classic Thermal Merino 1/4 Zip (Men’s) is built for real winter — the kind where you’re climbing, skiing, hiking, and still generating heat. Made from 100% Merino wool with a soft interlock knit, it traps warmth, wicks sweat, and manages odour so you can push harder without feeling clammy.

The updated slim fit follows the body without squeezing. Offset shoulder seams reduce pack rub. Flatlock seams cut out chafing. When you need quick venting, the 10" zipper dumps heat fast.

If you spend long days outside and hate being cold, this is the base layer that actually keeps up.

Key Features

• 100% Merino wool — warm, breathable, naturally odour-resistant
• Interlock knit for soft comfort and durability
• Slim fit layers cleanly under midlayers and shells
• Quarter zip allows quick temperature control
• Offset shoulder seams reduce pack pressure and rubbing
• Flatlock seams help minimize chafing
• Side seams wrap forward for better mobility and fit
• Heavyweight warmth for deep-winter conditions

Specs

• Fabric: 100% Merino Wool (exclusive of decoration)
• Fit: Slim
• Zipper: 10 in / 25 cm centre-front zip
• Construction: Interlock knit
• Seams: Flatlock, offset shoulders and sides
• Model: SW002822
• Made in: Vietnam