Start your layering system with Smartwool's most innovative foundation to date; the Intraknit™ collection. Smartwool's Men's Intraknit Thermal Merino Base Layer Bottom puts warmth first, while seamlessly knit mesh ventilation helps keep you dry and comfortable. The revolutionary 3D mapping provides maximum mobility and ribbed elbows provide added durability , so nothing slows you down. Gear up to take on any weather with these men's Merino wool pants.