Smartwool's updated the fit of their Men's Classic Thermal Merino Base Layer 1/4 Zip to improve functionality while also enhancing aesthetics. As one of Smartwool's 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
• Machine Wash Warm Gentle Cycle
• Do Not Iron Decorations
• Do Not Bleach
• Tumble Dry Low
• Cool Iron As Needed
• Do Not Dry Clean
• Wash With Like Colors