Truth be told, the best flip-flops are the Birkenstock Arizona Sandal! Birkenstock Arizona Sandals perfect for a casual day Features a synthetic leather upper and anatomically correct cork insole with suede lining. follows the contours of your foot, providing comfort balance and support. Includes adjustable straps with buckles for a perfect fit flexible EVA midsole for lightweight cushioning and moisture-wicking dual-layer jute for durability and longevity.