A640 Steel Toe Polyurethane in Color Black | BIRKENSTOCK US。Birkenstock A 640 Alpro Professional Clogs designed for demanding work environments. These slip-resistant clogs feature a durable polyurethane upper and a steel toe cap for enhanced protection. The anatomically shaped cork-latex footbed is lined with suede for comfort during long shifts. The solid black construction is grease-resistant and waterproof, making them ideal for kitchens, medical settings, and industrial use. The replaceable footbed ensures longevity, while the rugged outsole provides excellent traction on various surfaces.