BIRKENSTOCK® design elements, like a contoured cork-latex footbed that supports you through long hours on your feet. Contoured cork-latex footbed creates custom support with wear Fluid-resistant, PU-coated natural leather upper Cushioned PU midsole absorbs shock Slip-resistant TPU outsole Adjustable strap with metal pin buckle Certified Occupation Footwear: EN ISO 20347:2022 OB SR: AST Barely written but with small acid on toe, see photos for details. Size 39 regular