I never had back problems even at my chubby stages in life so the arch support is great. The base of the slippers is the perfect amount of thickness (not super thin and not crazy thick where it makes it difficult to walk). Got these awhile back and wasnt able to try them out right away. A number of reviews were saying that the buttons on shirts were too small and that by the time they woke up, the shirt was mostly if not entirely unbutton. Shoes feel very light and after a few miles of running the comfort is still great. 510} for more! Good spill resistance too. The build quality is just amazing. The first pair I ordered in a size 9 was defective but I didnt realize it since I had never worn this brand or style of shoe. They look great with my dress.