Natural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material.
Footbed material: Polyurethane
Polyurtehane (PU) is a flexible, water- and dirt-repellent synthetic material which makes footwear easy to care for.