That's them. Ugly, but comfortable as hell. I like to wear mine w/ scrubs.
Strangely enough, you can often find them for sale at Hallmark stores, often at the mall. Either 20 or 30 bucks, I forget.
And they are definitely worth buying. Very comfortable, and a great conversation piece. "Hey, check out my ugly shoes"
The only downside is, as they are rubber they wouldn't breath well, except there are a bunch of holes on the top. As in, holes for stuff to leak into . So, if you think you're going to be around body fluids, I advise shoe covers.
But otherwise they're nice. You can move the back strap forward to wear as a slip on, or if you have trouble keeping them on, you can put the strap in the back.
The soles have a bunch of rubber bumps in them that massage your feet, and they're just cushy enough.
As a side note, for people that start getting sore feet, legs and back after just a short time wearing normal dress shoes such as Dockers, try slipon dress shoes. I recommend Borns. They look very nice, and more importantly, you don't feel like whacking off your legs at the end of the day.