Olukai Ho'Opio Flip Flop Sandals Onyx Wms Size 7 37EU New in Box (store display) Ho'Opio (translation: to act young). Clean, slim, and playful, a sandal that rejuvenates your step all day long. Water-resistant synthetic straps with a quick-drying jersey knit lining and a soft nylon toe post. Anatomical poured PU footbed with micro-texture for traction and a lower profile for a modern and clean look and feel. Non-marking rubber outsole with ocean current inspired traction pod design for enhanced grip.