For several years, we went through the other guy wearing a mask when one had to leave the seat.
Then [ahh...the GOD's!] we had a Scott Sierra guy up front one night across the Pacific when we did this. He was horrified. The masks aren't easy to restow [see comment above] and were only designed to be removed from the box in emergency or for maintenance [annual?]
This feedback saw a change in the rules for O2 use >F250 as long as the masks are of a quick donning type.
G'day
