OLUKAI Holomua Synthetic Imported Upper: Soft neoprene base with adjustable webbing overlay and water-resistant rubber strap anchors. Footbed: Innovative lightweight injected TPU performance chassis and a soft molded anatomical ICEVA footbed with wet traction surface design. Outsole: Non-marking sticky rubber outsole pods co-molded with a lightweight compression molded EVA midsole. Molded siping for wet surface traction. Adjustable Nylon Straps: The nylon strap and plate design maximizes arch contour and delivers maximum comfort and functionality for high activity while minimizing weight at the same time. HLA Approval Seal: Rigorously tested and proven by the Hawaiian Lifeguard Association, the Holomua performs under the most extreme use and environmental conditions.