
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.
Features
Ski, climb, hike, camp, and summit with expert-curated, guide-tested outdoor gear from top brands. Shop online or visit us in Seattle for friendly advice!
Not valid on sale items, Garmin products, Arc'teryx or Totem Cams. Other exclusions may apply.
© 2026, Ascent Outdoors