The BIRKENSTOCK Kumba is an elegant, timeless sandal with adjustable crossed straps and a secure ankle strap. A stunning combination of beauty & comfort make this is a summer wardrobe staple. The upper is made from extra thick, oiled nubuck leather. Anatomically shaped cork-latex footbed Upper: oiled nubuck leather Details: two straps, each with an individually adjustable metal pin buckle; ankle strap