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.