Why the Sun is Your Biggest Enemy Near the Summit
At the Mount Everest summit, the atmosphere is so thin that UV radiation is lethal. Combined with the reflection from the snow, the sun can cause severe burns inside your mouth and nose during a Mount Everest expedition.
Without Category 4 sunglasses, the sun will burn your retinas in minutes. This 'snow blindness' is a common reason for failed Mount Everest summit bids and emergency rescues during Everest trekking.
Regular sunscreen isn't enough. Climbers use thick zinc paste to create a physical barrier. Even on the trek to Everest Base Camp, the sun is strong enough to cause second-degree burns without protection.
Light reflecting off the snow can actually burn the roof of your mouth if you breathe through your mouth. Wearing a buff is essential for protection during the high-altitude Mount Everest summit push.
Respect the sun as much as the cold. Proper protection is vital for a comfortable and successful Mount Everest expedition.
