The arch support is great.  I first purchased a size 8 which is my usual size but they were too large.  I bought a size 7 and wore them all day shopping.The left shoe tore a hole between my big toe and second toe.  I really want them to work for an upcoming trip, but I'm afraid to wear them again. It's frustrating because I can wear cheap flip flops all day without a problem...try to buy something more supportive and end up with a sore on my foot.