The Smartwool Men’s Intraknit Thermal Merino Base Layer 1/4 Zip is built for high-output cold-weather adventures, combining targeted warmth with breathable performance. Its engineered knit construction places ventilation and insulation where they’re needed most, helping you stay comfortable whether you’re skiing, hiking or spending a full day outside.
The slim, body-mapped fit layers easily under additional insulation, while the quarter-zip neckline gives you quick control over ventilation as your activity level changes.
Features
- 53% Merino wool, 45% recycled polyester, 2% elastane
- Intraknit™ body-mapped construction for targeted warmth and ventilation
- Merino-blend fabric helps regulate temperature and manage moisture
- Slim fit designed for performance layering
- Quarter-zip neckline for adjustable ventilation
- Engineered stretch for comfortable freedom of movement
- Ribbed elbows for added durability