Smartwool's Men's Intraknit™ Thermal Merino Base Layer 3/4 Bottom are the warm and winter-ready pants you need to perform all season. The Merino Sport yarn combines the power of ZQ-certified Merino wool with the strength and fast dry times of polyester. Featuring seamlessly knit mesh ventilation designed to keep you dry and comfortable and a 3D-mapped design for maximum mobility and durability, these are the men's wool bottoms every adventurer needs in their wardrobe.