Upper material: Suede - Thick and supple leathers without additional dyes to keep the leather breathable, durable and comfortable. * Footbed: Soft footbed - A foam layer is inserted between the cork layer and the suede liner of the original Birkenstock footbed. Millions of microscopic air bubbles cushion your feet while providing moderate arch support. * EVA Sole - Flexible, lightweight, durable and shock absorbing.