Anti gravity boots

has anyone used these?
did they help with circulation?
or stiff back?

I have this table
http://www.hangupsidedown.com/

It does help with circulation and sore backs. Me and the hubby use it every day.

thanks alot, i'll check it out.

I considered those at one point, but I hate the thought of landing on my noggin and snapping my neck. Although they are pretty kinky. :D