Like new Size 39 The Birkenstock Gizeh is perfect for warm days and evenings. Classic thong silhouette with an adjustable buckle for the perfect fit. Upper is made of acrylic and polyamide felt fibers with a leather-like texture on top and a soft fabric underneath against the skin. Anatomically correct cork footbed is crafted from cork that is 100% renewable and sustainable. Birkenstock's contoured footbed offers firm stable support, a neutral stance with room for toes to stretch and spread, and a natural walking motion that encourages optimal toe movement and blood flow. Suede-lined contoured footbed molds to the shape of your foot creating a custom footbed that supports and cradles.