1. PRIMO-LOFTFilled with 60g Primaloft One synthetic insulation, the Nano Puff has an amazing warmth-to-weight ratio, even when it gets damp. Plus, the soft, 15-denier shell has a DWR coating, keeping said dampness to a minimum. The fi ll is highly compressible, and the jacket packs into its own pocket, too.

2. SO LIGHTIn addition to a nearly weightless shell (1oz), the Nano Puff is a pullover, using only a quarter-length zipper to close up the front and neck, further shaving ounces.

3. COMMON THREAD It’s cool that the Nano Puff’s shell is 100-percent recycled, but it’s even cooler that the whole jacket, insulation and all, is also recyclable as part of Patagonia’s Common Threads program.

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