Dont bother, it doesnt work
Great idea, but I doubt they actually tested this before putting it on the market.  First, the suction cups didnt stick.  My tub has a textured floor, so of course the suction cups didnt stick. But even where the mat extended into the smooth part, it still didnt stick there either.  So it was trying to float, only held down by my butt and my feet.  Then, where I was sitting blocked the air flow.  There are pads, and I guess the idea is that they would keep you from blocking the air, but I was sitting in the wrong spot, or the pads compressed, or maybe my butt is just too big (and I'm not overweight).  So I got bubbles by my feet, where the hose was connected, and no bubbles at my back.  It is going back to the store.
Rating: 1 stars