When riding on children's vehicles, hard surfaces, sudden braking, and more can take a toll on children's shoes. Now it's full speed ahead. Thanks to the BIG-Shoe-Care, parents can breathe a sigh of relief, and little aspiring racers can focus entirely on trying out different riding options. The shoe protectors made of soft plastic material can be easily adjusted to the shoe size using the integrated locking pins and can be attached to all common children's shoes in sizes 21 - 27. The anti-slip profile on the bottom of the shoe protectors ensures a good grip while riding and walking. 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 it at the front, then pull up at the back).