I bought these for arch support. It was in the title. I got them and they were flat. At least my daughter liked them.

Update, the edges of the sandal that go on top of the for are not even. There are frayed pieces of plastic. My daughter has complained that they hurt her feet. She showed me the tagged edges.

I've read other reviews that say the plastic shrinks in the sun. I'll change my review of that improves the ragged edges.