N4521U
Plastic Pirate
Here you go Bill. Can't imagine sleeping like that. I have mine set at about 45 degrees and can only stand it for a minute of two at a time. Makes me feel like my eyes are gonna pop out. I usually tilt it for a minute, then go horizontal and rest for a minute or two, then repeat another two or three times. That's all it takes. I swear by it.
My uncle had one of them things in the 80's, a fad then over here, oops, in the States!
The way mylower back is I'd have to hang there for a week.