Stay comfortable through all your cold-weather activities with SmartWool's Classic Thermal base layer pants, crafted in wicking, temperature-regulating merino wool with body-enhancing seam placement and a movement-friendly fit. Itch-free merino wool is temperature regulating, moisture wicking and odor resistant Flatlock seams help reduce chafing Elastic waistband Triangle inseam gusset for increased comfort Layer-friendly fit Base layer weight: Midweight