I LOVE THESE. I picked up a pair at a local surf shop.  I am a 45 year old Cali girl who has NEVER owned a pair of flip flops I could walk in. I ended up falling off the back or flipping them off my feet. I had given up until I found these! The minute I put them on and walked I was sold! The arch actually keeps them on my feet!! No walking out and the arch is very comfy. It is pronounced so if you are flat footed you may be bothered by it. They fit true to size and I am a medium width foot and it is perfect. I can't rave enough about these and plan to order more colors!!!