The best baselayers are the ones you forget you're wearing until you need them most. Since 1985, Patagonia's Capilene has been the foundation that mountain adventures are built on – proven by gear testers who've worn the same shirt for nearly two decades across snowstorms at altitude, month-long bike trips, and countless expeditions. The Capilene Mid-Weight range delivers invisible comfort with its smooth face and diamond-grid back that manages moisture and temperature without fuss, whether you're layering under your shell or wearing it solo.

Pair it with something from the Patagonia fleece collection including technical midlayers that strip away complications while delivering everything you need. This is gear built to last through thick and thin, essential pieces that simply work, day after day, year after year.