BIRKENSTOCK Arizona EVA Birkenstock Arizona Sandals Regular Fit BLACK 42 (Japan size 27cm - 27.5cm) With box, with sandal hanger New, unused EVA material (ethylene vinyl acetate / EVA resin) is an extremely lightweight, cushioning, and flexible high-grade material. This makes uneven ground less noticeable and provides soft cushioning while walking. It is also water-resistant, making it suitable for both land and water use. I purchased these but haven't had the opportunity to use them, so I would be happy to pass them on to someone who will. I purchased these from the BIRKENSTOCK official website, so they are genuine, please rest assured. Thank you for your consideration.