Ultralight is an understatement of the Marmot Nano Jacket. It's slightly thicker than a newspaper page, yet delivers the performance of a much heavier and bulky jacket. The Nano is waterproof, windproof and breathable, and packs up to half the size of a 32 ounce water bottle. It's a four season shell that can be used as a rain coat on summer backpacking trips and as a shell during winter ski tours. The only problem is it packs up so small, you'll forget where you put it.
Marmot Nano on the Slopes