Air New Zealand has launched lie-down beds in economy class -- and quickly warned passengers not to use them to join the mile high club.

Bosses from the airline say 25 percent of the economy seats in their new Boeing 777-300ER jets i will be able to convert into beds.

The Skycouch is formed by opening out the leg rests of a row of three seats along the window sides of the aircraft - giving a 1.75-metre bed.

A spokesperson for the airline said they had no problem with couples cuddling in the beds - but urged them to keep their clothes on… something no doubt appreciated by the third person on your row of seats.