Men's Base Layers

We've updated our Men's Classic Thermal Merino Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 10...

Technical. Comfortable. Reliable. That's what you get with our Men's Intraknit Merino Tech 1/4 Zip. This durable mid layer features our high-perfor...

Discover the perfect foundation for your layering system with SmartWool's  Intraknit™ collection. This Men's Intraknit Thermal Merino Base Layer...