Economy seats.
Wish they had symmetry (body likes symmetry), but, it's still something innovative.
https://www.designboom.com/design/zephyr-seat-lie-flat-economy-class-06-19-2020/
Yes, perhaps they have some security features.. seat belts all around.:--)
idnk when available, but I can't wait to try.
@artemis the top layer - not super safe looking.... but it's something