Amazon.com | Birkenstock Original A 640 Alpro-Foam Medium 。Birkenstock A 640 Professional Clogs provide ultimate protection and comfort for demanding work environments. Constructed from water-resistant and dirt-repellent polyurethane, these slip-on clogs feature a solid steel toe cap for safety and a slip-resistant PU outsole for superior traction. The anatomically shaped cork-latex footbed is lined with breathable leather to support natural foot movement during long shifts. Ideal for kitchens, medical settings, and industrial use, these durable work shoes are washable up to 80°C (clog) and 30°C (footbed).