We've updated our Men's Merino 250 Base Layer Bottom to bring you a better fitting, more functional tight. The technical benefits of 100% Merino wool will help you keep your game at a high level for longer. And our heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away.. . ?. . . Merino 250: This heavier, soft, 100% Merino wool fabric offers breathable warmth, moves sweat away from the body, and provides next-to-skin comfort in colder conditions. Slim Fit. 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance. Fit updated to improve functionality while enhancing aesthetics. Merino-covered elastic interior waistband and traditional fly design. Flatlock seam construction designed to minimize chafing. Size M inseam: 30 (76 cm). 100% Merino Wool. Garment Weight: 228 g / 8.04 oz. Machine wash. Imported.