Birkenstock Women's Gizeh Thong Sandals 100% Synthetic and leather Made in USA or Imported Synthetic sole Platform measures approximately 1/2" Oiled leather  unique characteristics of the leather are highlighted by a rich oil treatment, develops a natural patina over time Contoured cork footbed conforms to the shape of your foot and features pronounced arch support, a deep heel cup, and roomy toe box; lined with suede Sole material: EVA - Flexible, lightweight, durable and shock absorbing. Lightweight EVA sole for cushioning and shock absorption Avoid extreme heat / Heel shape: flat