When the temperature drops and adventure calls, the Smartwool Classic Thermal Mock Neck delivers the perfect foundation for your cold-weather pursuits. This women's merino wool base layer transforms chilly mountain mornings and frosty trail runs into comfortable experiences, thanks to merino's natural ability to regulate your body temperature while wicking moisture away from your skin. The flatlock seam construction eliminates the chafing that can turn a great ski day or climbing session into an uncomfortable ordeal, while the regular fit gives you complete freedom of movement without that bulky feeling under your outer layers. Whether you're carving fresh powder, tackling a winter hike, or grinding through those early-season bike rides, this thermal top keeps you dry, comfortable, and odor-free from first light to last run.