Birkenstock Jackson - Ochre Size 38 Features a water-repellant upper and waxed seams, as well as a robust, rubber sole to ensure a secure grip. And the cork frame of the outer sole guarantees an authentic design. The upper is made from water-repellant, oiled nubuck leather. Cork frame of the outer sole guarantees an authentic design. Removable, anatomically shaped cork-latex footbed Upper: oiled nubuck leather Footbed lining: smooth leather Sole: thermoplastic rubber Made in Portugal