When HN users recommended it
1 HN user recommended this in 2024, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
PSOLAR Heat Exchange Mask Full
Amazon's catalog no longer lists this product (checked 2026-11-02). The name comes from the link HN users posted.
I used a PSOLAR Heat Exchange Mask (https://www.amazon.com/PSOLAR-Heat-Exchange-Mask-Full/dp/B00...)
for high altitude mountaineering and it worked very well for keeping warm but it didn't work like that and wasn't really a 'Heat Exchanger'.
What it actually had was a moisture absorbing substance stuck on a plastic comb like structure.
When you breathed out damp air from your lungs the substance would absorb the moisture and when you breathed in dry air it would release the moisture making it more humid.
This actually made a big difference to body heat as breathing in cold dry air onto hot moist lungs is very cooling from evaporation.
It also stops your lungs drying out. If you read Everest books they all get dry lungs and chest infections the the psolar thing seemed pretty good at stopping that.
I get the impression these are similar - really moisture exchangers and the 'heat exchanger' thing is marketing.