We&';ve updated our Men&';s Classic Thermal Merino 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 warmest-weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away. Slim Fit Fit updated to improve functionality while enhancing aesthetics 100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistance Garment Weight: 228 g = 8.04 oz Knit in Vietnam: 100% Merino Wool Size M inseam: 30" (76 cm) Flatlock seam construction designed to minimize chafing Merino-covered elastic interior waistband and traditional fly design