Birkenstock Unisex Arizona Sandal,Cortina Brown Leather,41 M Eu Leather / Nubuck / Suede Synthetic sole Uppers are made of thick leather that's minimally processed; they're durable, breathable, and comfortable Suede footbed liner naturally wicks away moisture EVA outsole is lightweight, flexible, shock-absorbing, and repairable This style features the original Birkenstock footbed; a cork and jute support system that molds to each individual's footprint Contoured design provides firm arch support