Smartwool is bringing a new dimension to their active winter wear with these Intraknit Merino 250 bottoms. Targeted insulation and ventilation allow you to stay comfortable while youre out working up a sweat. Smartwools 3D-knit, articulated design is sculpted to the body to enhance movement and comfort in high-intensity activities, meaning that, while youre out running down your goals, these bottoms will help you stride easily toward your finish line.