Now it's full speed ahead. Thanks to the BIG Shoe Care, parents can breathe easy while young aspiring racers can focus entirely on trying out different riding options. The BIG shoe protectors reliably shield the shoe tips from wear and tear. Made from soft plastic material, the shoe protectors can be easily adjusted to the size of the shoes using the integrated locking pins and can be attached to all common children's shoes in sizes 21 to 27. The anti-slip profile on the underside of the shoe protectors ensures a good grip while riding and running. Additionally, the high-quality plastic leaves no marks on floors. Recommendation: First, lay both side flaps on top of each other to see which locking pin is needed for size adjustment. Then remove the protector and simply click in the respective locking pins. Only then should you pull the protector over the child's shoe (insert at the front, then pull up at the back).