OLUKAI Ohana Sandal - Men's Navy/Black 15 Synthetic Upper: Water-resistant synthetic leather strap with soft, quick-drying jersey knit lining and neoprene backer. Footbed: Anatomical compression-molded EVA midsole with a brushed ICEVA drop-in footbed for personalized fit. Outsole: Non-marking gum rubber outsole with a coral reef lug design for added grip. Features: Soft nylon toe post webbing, laser-etched logo, and embroidered detail.