Cold-air breathing mask on Everest
Also called: Airtrim mask
What it is for
A mask that warms the air you breathe in very cold conditions, protecting the throat and lungs.
What Everest asks for
Optional
Recommended, especially if your throat or lungs are sensitive: warms and moistens the air you breathe and eases the Khumbu cough
Other mountains
- Optional on: Everest, Vinson
