Beautiful, children's crocs are made of foam material. They are light and comfortable, plus they have holes in the upper to make it easier to ventilate the shoes. Ideal for playing in the garden, by the pool or on the beach. Crocs also have a strap to hold the foot against slipping. When choosing a size, please refer to the size chart.1912/2012,5/2113/2213,5/2314,5/2415/2515,5/2616/2717/2817,5/2918/3018,5/3119/3220/3320,5/3421/3522cm