Also, you are up above the protective atmosphere enough to get more radiation and your cabin is pressurized to 8000 feet so there's the oxygen depletion.
That's slightly higher than Denver, which is not nearly as bad as 8000 feet but still enough to bother unaccustomed people. The 8000 feet is an old number and may be wrong now.
Also, you are up above the protective atmosphere enough to get more radiation and your cabin is pressurized to 8000 feet so there's the oxygen depletion.
My skydiving altimeter said 6k last time I flew commercial
That's slightly higher than Denver, which is not nearly as bad as 8000 feet but still enough to bother unaccustomed people. The 8000 feet is an old number and may be wrong now.