For unbeatable defense against cold weather, SmartWool's NTS Mid 250 Bottoms deliver with the softness, warmth, and moisture-managing performance of pure merino wool. NTS (next to skin) Mid 250 base layer for cold-weather performance. Fine merino wool fibers provide supersoft, itch-free comfort and warmth SmartWool breathes, manages moisture, regulates temperature, and naturally resists odor. Interlock knit. Wide self-fabric covered elastic waistband for comfort and a flattering fit. Flatlock seam construction is designed to elimninate chafing. Heat transfer logo at left hip. Inseamsize M: 30 in. (77 cm). Form fit: Slim fit; follows the contours of the body. Natural rise.