For the price you can't beat these sandals if you have flat feet. They have built-in soft arch support. You must be able to walk and run. The outsole is a type of spongy rubber and doesn't seem afraid of picking up foot odor. I've found them comfortable to wear but haven't broken them as a long term wearer yet. I liked them so much that I ordered another pair in a different color. They seem to be running out in my size soon. Other people must like them as much as I do. I hope they will be available at the same price.