The harness is suitable for the first day. Then it expanded. It would probably kill a few stars, but what it really does for me is the sculpted base. It's too hard for my foot and too flat. I don't have a high arch, but with normal use the heel slips in and I end up running on the outside of the foot. I have to constantly lift the toes of the flip flops due to the loose strap and after a week they are already showing signs of wear. I've worn them maybe a dozen times, probably 12 hours total.