The Birkenstock A 640 is a professional clog built for durability, comfort, and safety in demanding environments. Made from one-piece polyurethane, it is oil-, grease-, and water-resistant—ideal for kitchens, hospitals, or laboratories. The removable, anatomically shaped cork-latex footbed offers superior cushioning and support, while the slip-resistant outsole ensures stability on slick surfaces. Easy to clean and highly practical, it combines Birkenstock’s ergonomic design with industrial-grade protection and everyday reliability.