UKC

Fire up your Alpine adventures with the Alpine 850 Nano Hoodie's uncompromising, high-performance design that keeps you warm in the high places without weighing you down.

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Hmm. Is anyone qualified to expand on this?

https://ultralightoutdoorgear.co.uk/blog/montanes-expedry-down-technology-e...

This seems to explain it somewhat? I'm still a bit skeptical, but it appears to work in some capacity.

Interesting. That does seem to suggest it dramatically improves drying time, explained thusly:

'The ExpeDRY gold particles create an electro-static shield that provides a small hydrophobic barrier and weakens the hydrogen bond that allows water to form…By attacking the hydrogen bond of the water molecule, ExpeDRY helps keeps moisture from coalescing into droplets (as is the case with performance in use) and helps break that bond to help any water that may be present to dry faster.'

I also can't help but remain skeptical, thanks to phrases such as 'non-toxic gold particles', and ULOG's reference to °F in their methodology

I asked a similar question here:

https://www.ukclimbing.com/forums/gear/montane_alpine_850_nano_hooded_down_...

which Rob answered to some degree.