Birkenstock Black Bilbao Mule Sandals

The Bilbao two-strap sandal combines the anatomically shaped design of the original Birkenstock footbed with an additional latex heel cushion and an air-cushioned PU sole. Anatomically shaped PU footbed Upper: Birko-Flor (a synthetic compound) Footbed lining: suede Sole: PU (polyurethane) outsole that is resistant to oil and grease Two straps with adjustable metal pin buckles Non-marking sole Upper - 100% Other materials, Lining. and Sock - 100% Leather. Sole - 100% Other materials.