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. Covered elastic waistband. Traditional fly design. Flatlock seam construction for a smooth fit and chafe-free comfort. Inseamsize M: 29 in. (74 cm). Form fit: Slim fit; follows the contours of the body.