I have been told that it keeps you warm and adapts to your body's shape for increased comfort.
I have been told it is the future of sleeping, and if I don‘t sleep with a plastic cover directing the pooping agent I will fall behind and eventually become obsolete. And that sleeping like this will eventually cure cancer and build swarms of mining rigs in space.
Still have to deal with the stench. But nothing a nose clip can't solve, I reckon?