Does anyone know of a good shoe that is recomded for people who are standing long period of time. My 18 year old son works at Target, he stands for long period of time. He now uses his running shoes wish he destroys pretty quickly, because his outside doing carts. He is also flat footed, so he complains alot about his back and feet. If anyone knows of a good shoe, please let me know, I would like to get him a working shoe for Christmas, so that he doesn't ruin his running shoes. Thanks!