Using packets of air, this animal-friendly down gives adjustable warmth

The NuDown is a line of jackets powered by a rather cheap insulator: the air around us. Trapped air is one of the best insulating materials on the planet and the NuDown claims to be the first in harnessing in this way.

NuTech is the label’s proprietary technology. NuTech doesn’t only use air to warm up the jackets, it also lets the wearer decide just how much a jacket is insulated. This means the NuDown jacket keep the wearer warm on a cold day as well as on a subzero ski trip.

This adjustable warmth works with a manual hand pump built into the jacket. Similar to the ones you’d find in a blood pressure monitor, this fills up laminated chambers on the jacket with air if needed. The principle is that the more air you pump in, the warmer the jacket can get.

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