Birkenstock Unisex Zurich Sandal 100% Leather Imported Synthetic sole Uppers are made of thick suede 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