How long to Acclimatize to 25000 feet?

Answer:

This is not humanly possible. Respirators are absolutely necessary for any long term -and sometimes even short term- survival for climbers to the top of Mt. Everest; Not even the native Sherpa's live near its peak.

First answer by ID0410502246. Last edit by ID0410502246. Question popularity: 2 [recommend question].