Children's sandals are made of patterned foam material. This model is extremely light and comfortable to use. The sandals are fastened with velcro, which will allow you to adjust the footwear to the length of the leg. This model is set on a delicate platform. When choosing a size, please refer to the size chart. 23-13/24-14/25-14,5/26-15,5/27-16/28-16,5/29-17cm