OLUKAI. 10101-SK63. HIAPO. RUM WITH DARK WOOD. What makes an OluKai sandal truly built to last -- We like to think it s a few things - tradition craftsmanship and attention to detail. The Hiapo is constructed with naturally tumbled or marbled full-grain leather using hand-sewn traditional whipstitching complete with Moko tattoo artwork details on the footbed. One of our original sandals hence its namesake Hiapo only gets better with age.