My children attend a preschool that requires soft-soled slippers to be worn in the classroom, and I had difficulty finding any locally that fit my daughter well, were easy to put on and take off independently, and seemed durable and comfortable for long-term use.  Last fall I bought a similar pair of Ragg slippers and she loved them.  Since then, as she's grown and changed sizes, I've bought two more pair including these (our most recent purchase).  They work perfectly for her.  The adjustable strap means that we can personalize the fit, which is helpful for her narrow feet.  The soles are flexible and soft, but still durable enough enough for daily use.  In a pinch they can even be worn outside.  The inside is soft and warm and she loves the cute designs.  Each pair has lasted us about six - nine months of almost daily indoor use, including some rounds of machine washing.  By the time she outgrows them, they are definitely almost worn out, but I have no complaints about their durability considering how much she wears them.