There are some pretty wacky ideas out there for ultra-light camping techniques. This one is particularly strange.
TGO Magazine's new contributor Eddy Meechan is experimenting with wearing a dust mask while sleeping to reduce the amount of warm air that's lost. Eddy writes:
All cold climate mammals are equipped with long snouts and enlarged nasal cavities and sinuses.
The larger the surface area of the nasal cavity and sinuses, the greater the capacity for preventing heat and moisture loss. It's been suggested that this is why our cold weather cousin Neanderthal man had such a huge conk compared with ours.
I'm not endorsing his approach, just reporting it. Read the whole article and judge for yourself.