Birkenstock Unisex Arizona Pebbles Metallic Silver Leather Sandals - 39 M EU / 8-8.5 B(M) US Leather Imported cork sole Raised toe bar is designed to encourage the natural gripping motion of your feet, exercising your legs and aiding circulation. Neutral heel profile and deep heel cup keeps the natural padding of your foot where it belongs, under the heel, distributing your body weight more evenly. Flexible EVA outsole offers lightweight, shock absorbing support with lasting durability. Dual layer Jute: top wicks away moisture while the bottom adds strength and makes resoling easy.