Made of heavyweight merino wool, the men's Smartwool Classic Thermal Merino quarter-zip base layer top helps regulates your temperature during high-intensity skiing, hiking or running in cold weather.

Features

• Interlock-knit merino wool fabric enhances comfort, breathability and thermoregulation while naturally resisting odor buildup
• Fit updated with shoulder panels to eliminate shoulder seams for improved functionality
• Flatlock seam construction minimizes rubbing and chafing
• 10 in. center front zipper has a semi-locking slider to stay put