Tighten those bum cheeks with the Butt Cushion

Apparently, all you need to do to tighten those buns is to simple sit on this cleverly designed cushion by Cogit.

I would love to tell you how it does it and what the hell that hole is doing there in the middle but alas the site is in Japanese so if there are any Japanese readers that can let us know whats going on here we would be delighted!