I bought these because they're mid-cut with double straps, which I thought would be good for my child's foot development, but I realized they didn't fit my child's foot width, so I replaced them after about a month. In terms of days, I think they were only used for about two weeks, as they were used in conjunction with sock shoes. I did clean them at home, but there's some dirt on the soles that I couldn't remove, as they were used when going out. Would you like to try them?