Smartwool Men's Classic Thermal Merino Base Layer Pants - These updated Men's Classic Thermal Merino Base Layer Bottom 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 the heaviest weight wool fabric will help keep you warm and comfortable as you ski, run, and hike the day away. Slim fit 100% Merino wool fabric 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: 30in (76cm) Weight: 228g Style: SW016361