A 630 Polyurethane in Black from Birkenstock.

The A 630 PU clog is an enclosed design with a nonslip treaded sole for reliable grip and maximum sure-footedness. Ideal for kitchen and food industry. Its oil- and grease-resistant material is also water-resistant, allowing it to be cleaned efficiently and thoroughly. The anatomically shaped original BIRKENSTOCK footbed protects joints and tendons, and is also washable at up to 30° Celsius. 

• Removable, anatomically shaped cork-latex footbed, washable at up to 30°C
• Material: PU (polyurethane)
• Footbed lining: suede
• Sole: PU (polyurethane), nonslip, oil- and grease-resistant