Patagonia Nano Puff Jacket - Men's

When you're anchored in the shade at the belay or driving the Coquihalla in a Westfalia with a capricious heater, this svelte layer cuts off the chill. It's streamlined enough that you can wear it while you set off to climb the pitch, and if you need to stash it, it stuffs briskly into its own internal pocket.