If you're budget-restricted, these IRO Pumps will fit the bill. It's a great choice, while not very pricey. You can also consider these IRO Booties. It's a product you'll love which also doesn't cost a fortune.
If you have enough to afford it, then what you're looking for is these IRO Flat Sandals. It's more expensive but worth your money. While you're at it, also have a look at these IRO Pumps. Yes, this item is expensive, but it does not mean it's not worth it.