Isn't it the same as skier's hack? - air drying your lungs out. Ahh don't really know.
Apparently if you breathe through a thin layer it traps some of water vapour allowing you to breathe it back in again (recycle it)... or something... Oh and breathe through your nose...
Isn't it the same as skier's hack? - air drying your lungs out. Ahh don't really know.
Apparently if you breathe through a thin layer it traps some of water vapour allowing you to breathe it back in again (recycle it)... or something... Oh and breathe through your nose...