Upper material: polyurethane. Footbed material: polyurethane Outsole: polyurethane. Product features: - Replaceable PU footbed, washable at up to 60C. - Sole: oil and grease resistant. - Width: normal. Areas of use: Thanks to its durability and hygiene properties, it is ideal for the kitchen, medicine and food industry - but also as a practical garden clog. The professional Birki testifies to the wide range of uses in professional and private environments. Its compact shape is made of water and dirt resistant polyurethane, which is also oil and grease resistant. This extremely durable material can be washed at up to 80 C and disinfected effectively.