OluKai Mens Nalu Slide Slip On Open Toe Sport Sandals Synthetic Imported Synthetic sole Lightweight, quick-drying, durable water-resistant material built for in and around water. Non-marking rubber outsole, lugged and siped for enhanced traction. Anatomical compression-molded EVA midsole with an ICEVA drop-in footbed. Our vegan friendly footwear offers the durability, traction and support you expect from OluKai 100% high-quality synthetic materials, 0% animal products.