A recent evening flying experience of mine had me sitting next to a college age guy that had a zrest pad and a paper bag as carry-ons. But he also brought mud from the Grand Canyon on his legs. He apparently had hiked out of the canyon that day and got to Phoenix by that evening to hop a plane to Boston, without taking a shower. I had to endure 6 1/2 hrs of 10 day stench sitting next to me.

He went right to sleep, but not I.