NWOT Smartwool Men’s Intraknit 250 Baselayer Bottom in Navy Size Medium. Smartwool has reduced the bulk in these Intraknit Merino 250 bottoms, bringing a new dimension to their active winter wear. Targeted insulation and ventilation allow you to stay comfortable while you're out working up a sweat. Smartwool's 3D-knit, articulated design is sculpted to the body to enhance movement and comfort in high-intensity activities, meaning that, while you're out running down your goals, these bottoms will help you stride easily toward your finish line. Features Slim 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 while ribbed knees provide added durability 100% Merino yarn provides the full power of Merino with unparalleled moisture management, insulation, thermoregulation, and odor control Knit in Vietnam: 100% Merino Wool