Sandals are in excellent gently used condition besides man-made holes on straps near buckles. See pictures for Birkenstock size chart. Message any questions. Thanks for looking. Birkenstock Arizona slide sandals featuring an eye-catching "Icy Active Red" (or Rosso) colorway. Upper Material: Birko-Flor®, a high-quality, durable synthetic alternative to leather patented by Birkenstock. It features a smooth matte finish on the outside and a soft, breathable fleece layer on the inside to prevent chafing. Buckles: Two individually adjustable plastic or rubberized metal pin buckles color-coordinated to perfectly match the straps. Outsole: Lightweight, flexible, and shock-absorbing black EVA (ethylene vinyl acetate) plastic.