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If you take your base layer game seriously (and you should), the Smartwool Intraknit Merino 250 Thermal 1/4 Zip Base Layer Top is the holographic legendary version. 100% pure Merino wool is incredibly insulating, breathable, and odor-resistant, with a combination of 3D mapped zones and mesh ventilation panels for a premium base layer that is durable, free-flowing, and comfortable.
100% Merino Wool
Athletic Fit
Engineered Construction Uses Knit Structures to Enhance Performance with a Sophisticated Finish
Insulating Terry Loops Are Seamlessly Paired with Mesh Ventilation In Gender-Specific Zones Designed to Balance Warmth and Breathability
3D Mapping Results In Near Custom Fit and Freedom of Movement
Ribbed Elbows Provide Added Durability