Nufoot Betsy Lou style has the same adorable strap detail like the Mary Jane and more fitted than the ballet flat slipper. Nufoot is reinventing indoor , where comfort and style coexist to make for happier feet. Made with the latest sports technology, Nufoot is water-resistant and super comfortable as the skid-resistant soles gives you a good grip on any indoor surface. No matter where you are - in your home, in the office, in the gym, in the library, on an airplane or cruise ship, Nufoot is the perfect companion for your feet. We know how difficult it is to buy online, but rest assured. Nufoot is the most flexible and accommodating that you can purchase online. Size small fits Women's shoe sizes 4 to 5, medium fits size 6 to 7, large size 7 to 10, x-large size 10 to 12. Machine washable and air dries quickly.