The Office for the Development of Substitute Materials brings us the Vertical Bed, an ingenious contraption that fully collapses to fit into a briefcase.

The Vertical Bed provides total support for body weight when attached to subway ventilation grating. The components include noise-cancelling headphones, opaque sunglasses, and a free standing umbrella case. (An ideal feature for future versions might be some sort of alarm system to ward off pick-pockets.)

Want to see it in action? Check out this time lapse video of a man taking a 40 minute nap at Broadway and 33rd St. in New York.