Patagonia’s Lightest Nano-Air Ever – The Nano-Air Ultralight

by Brian Mullin on April 2, 2025

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Patagonia introduces the lightest addition yet to the Nano-Air family: the Nano-Air Ultralight Hoody and Nano-Air Ultralight Pullover, designed for high-output adventures in cool conditions.

The original Nano-Air revolutionized active insulation in 2014, debuting with 60 grams of innovative FullRange® insulation. A few seasons later, the Nano-Air Light followed with 40 grams, enhancing breathability.

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Nano-Air Ultralight Hoody

Now, after years of testing and prototyping, Patagonia introduces the Nano-Air Ultralight—featuring just 20 grams of FullRange® insulation for unparalleled stretch, breathability, and packability.

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Designed for cool, high-output days, this featherlight and weather-resistant insulated layer keeps you moving comfortably through the mountains.

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Photo courtesy of Patagonia – Benjamin Ditto

Its compressible, stretchy design ensures optimal performance, whether worn under a harness or a backpack.

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Nano-Air Ultralight Pullover

  • Key Features:
    • Ultra-breathable & stretchy for high-output activities
    • Slim fit & articulated patterning for maximum range of motion
  • Recycled Materials:
    • Shell & lining: 100% recycled polyester air-permeable ripstop with a PFAS-free DWR finish
    • Lower arm panels: 100% recycled polyester double knit with a wicking finish
    • Insulation: 20-g FullRange® 100% recycled polyester
  • Weights and Prices:

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