Used indoors once a week for about six months. There is some dirt on the left shoe opening and a part of the sewing thread is slightly loose on the inside of the right shoe, but I think there is no problem with use. Please check the photos 9 and 10. There is little wear and tear, and I think you can still use them for a long time. I washed and stored them, but please note that there are some stains that will not come off.