When we travel by air my wife finds it very difficult to relax much less sleep. I on the other hand can doze off seated at the gate or onboard in no time flat. Put me in even a five star hotel for a night or two and I'll be awakened by building noises or light. I'm a guy who put a poncho around me and slept leaning against a tree during monsoon season, call me crazy I won't argue the point.