Like all heels, they tend to ache after a bit, but that is more than I dont wear heels often. A well produced and made in the USA product thats also ALL natural is hard to come by. I wear a ladies size 9 1/2 shoe and the slippers fit perfectly with room to spare to wear a pair of ballerina flats with the slippers. Now I know why they are on sales. Bought these to help my son who is sensitive to loud noises. I was looking for something to replace the old one and this one had a number of good reviews. The new ones look sooo much smaller. Not a happy buyer. to buy another two or three PJs sets for her, since Covid restrictions has us home a majority of the time. The sandal is very comfortable.