preowned condition. please see photos for signs of wear. smoke free home. The Birkenstock® Gizeh - Birko-Flor™ & Birkibuc™ is perfect for warm days and evenings. Easy care Birko-Flor™ upper in a 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. Birkenstock uses the color names Antique Lace Birko-Flor and Graceful Pearl White interchangeably and boxes may arrive marked as either. 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. This is the foundation of active recovery. Suede-lined contoured footbed molds to the shape of your foot creating a custom footbed that supports and cradles. Raised toe bar is designed to encourage the natural gripping motion of your feet. Neutral heel profile and deep heel cup aid in distributing body weight more evenly. Flexible EVA outsole offers lightweight, shock absorbing support with lasting durability. Dual layer jute wicks away moisture.