Exactly what espadrilles should feel like. Comfy and very light. True, there is no rim around the edges, so nothing holds them tight around the feet, but I don't mind. I think all espadrilles are made like that. They could slip off your heels if your feet are really narrow, though.
My biggest concern was that they would fall apart quickly, but now I don't think that they would. They're a bit warm for hot summers, but very comfortable. All in all, very pleased with this purchase, especially at this price.