I bought these for my daughter who has flat feet and normally wears orthodics in her sneakers. During the summer, though, she likes to wear sandels and flip flops just like everyone else. After coming home from a pool dance with very sore feet from all the walking she did, I ordered these for her from Amazon. (I own a pair of Crocs RX for my heel spurs, and they are GREAT!) They were less expensive than anywhere else, and the free shipping didn't hurt, either! She LOVED them! They're padded on the inside, and come in many different colors. After she walked for miles while we were on vacation, she never complained about sore feet, and we had to hurry to keep up with her! I ended up buying her a second pair. They do run slightly on the large side, so the first time I ordered her a size 8 (she normally wears a size 9 to a 9 1/2, depending on the shoe, but has wide feet). They were fine, a perfect fit! The second pair I bought her was the size 9, and they were larger, but they were fine also. There really is not that much difference from one size to the next.