The TRUTH About Winter Layering No One Talks About

Ok I have been on the hunt all afternoon trying to prove or disprove my statements in the video. First a confession, the chemical heating of wet wool is something I’ve heard for years and have accepted as true. There are numerous websites that claim this happens by the wool breaking down the hydrogen in water. But I cannot substantiate this with highly credible sources. What I have found is the heat of sorption or the heat of wetting is highest in wool fibers as compared to other fibers that absorb water. Some research seems to suggest this heat can be felt by those wearing wool. I don’t claim to fully understand sorption but from what I understand it is a chemical process.

As part of this video I did do some testing that I ultimately decided to leave out of the video because I didn’t think it would hold interest. I’m my test I had a wet synthetic sock, a wet wool sock, and a dry control sock. The wet wool sock was consistently 1 degree F warmer than the wet synthetic sock but 3-4 degrees F colder then the ambient air temperature. The control sock was constantly 1 degree F warmer than the ambient air. I concluded the 1 degree difference was due to the warming of wet wool I’ve always heard about, but admit it could just be that wet wool is better at insulating than wet polyester.

Some articles below that seem to support the heat of Sorption in wool:

How Wool Generates Heat:

Gear Seen in this Video:

Wool Base Layer:
Down Jacket:
Fleece:
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