I am very into tray-table sleeping. It’s my preferred way of passing out on flights because you go straight down and don’t end up with a crick in your neck from leaning left or right.
I think this Ostrich (love the name) sleeping sack would be perfect. Found on Moglea. It’s still a prototype–they’re working on making sure you don’t suffocate in there, but when it’s out for real I may be buying one for the hop across the pond. It just looks so cozy!