Classic Thermal Merino Base Layer Bottom – Women's

When the temperature drops on a winter hike, backcountry approach, or cold-weather trail run, this is the bottom we reach for. Pure merino wool regulates temperature naturally and resists odor without synthetics, so you stay comfortable from a cold start through a sweaty climb. Flatlock seams and a covered elastic waistband keep it chafe-free under any shell.

• 100% merino wool interlock fabric provides natural warmth, breathability, and odor resistance — no synthetic blends needed
• Flatlock seam construction lies flat against skin to eliminate chafing during high-output activities like skinning, hiking, and trail running
• Classic fit with covered elastic waistband layers cleanly under shell pants, ski bibs, and softshells without bunching or rolling
• Merino's natural temperature-regulating properties keep you comfortable from cold morning starts through warmer afternoon efforts
• Wide color selection — from everyday Black and Charcoal Heather to Emerald Green, Twilight Blue Heather, and printed options like Black Digi Snow and Nightfall Linear Peaks — in sizes XS through XL