Slip the SmartWool Men's NTS Mid 250 Pattern Bottom underneath your snow pants for warmth on the slopes. As SmartWool's warmest bottom, this base layer also works great for hiking, running, and camping in cold conditions. Made of midweight interlock merino 250gm2, this base layer bottom traps fiery warmth while actively wicking moisture off your skin for enhanced thermo regulation. Since merino naturally fends off odor build up, this bottom stays fresh after use. Additionally, its smooth flatlock seams and covered elastic waistband won't irritate sensitive skin, ensuring hours of continuous comfort.