The OluKai Women's Ho'opio Ae'o Sandals are everything you need in a flip-flop. Made of synthetic leather, the water-resistant straps are slender for a feminine, beach-inspired look. The toe post is made of nylon to avoid chafing, and the lining is a jersey fabric. Poured polyurethane provides a comfortable, supportive footbed, and the etched design of the ae`o bird is a meaningful reminder of the endangered species. A rubber outsole provides excellent traction for slippery surfaces.