The Birkenstock Sandal Rio 1012520 Metallic Copper Narrow is a girls sandal with a good leather footbed.The shoe has two adjustable straps for an optimal fit.In addition, the upper and lining are made of Birko-Flor.The sole is made of EVA material.The shoe has a normal to narrow width.-EVA is a soft, flexible but very durable, UV and weather resistant, insulating, lightweight and durable material.This makes EVA a much more effective and durable material than the well-known PVC and rubber.A product made of EVA material has the same properties on the outside as on the inside.(If the EVA material tears/breaks, the inside will not absorb moisture either).