With my birthday gift money I picked up the most comfortable pair of flats at Gap this weekend. I've seen this type of flat in magazines, they fold up small and very stretchy. They may be the most comfortable pair of flats I own-they feel like you are wearing slippers, but ones that will stay on. My pair is a cognac color, not shown online but available in stores.
I went a size up. And, ending today, you can get 30% off your Gap (or Old Navy and Banana Republic) purchase with the SAVE30 promo code.