Patagonia didn't invent the flip-flop. The Fly Away Flip-Flop for women is just environmentally less harmful due to the compression-molded EVA midsole (15% recycled) the rubber seashell outsole (20% recycled) and the nylon toe post (100% recycled). In addition both the suede leather footbed and pigskin-lined leather strap are tanned to high (ISO-14001) environmental standards.