Your first line of defense. And comfort.

A good baselayer isn’t just about warmth — it’s about staying dry, moving freely, and not smelling like a locker room by day two. These are the ones our guides rely on: moisture-wicking, breathable, and built to perform whether you're climbing through sleet, sweating up a switchback, or crawling into a cold tent. Merino, synthetic, or a strategic blend — every piece here earns its spot in your layering system.