Thomas Cook, the British-based leisure airline, is adding “Sleeper Seats” to its A330 fleet.
“Sleeper Seats” will come with a mattress pad, pillow, blanket, and amenity kit. Seatbelts will need to remain on, but seat belt extenders will be provided so you do not feel constrained.
I don't know about you, but I think this is a fantastic idea. Trying to sleep on a plane in coach is one of the worst things and it's what contributes the most to you feeling awful depending on how long the flight is.