From Olukai

The 'Ohana Koa, a stylish member of the water-resistant 'Ohana family, lives up to its name with a split-strap design that speaks to those that dare to push the boundaries. With a coral reef lug design on the outsole for added grip and traction, if the boundary is slippery—then you'll be just fine.

• UPPER: Split strap, water-resistant textured synthetic straps, with ultra soft quick-drying jersey knit lining, and a soft comfortable nylon toe post.
• FOOTBED: Compression molded, EVA midsole with brushed drop-in ICEVA footbed provides anatomical fit for sustained comfort.
• OUTSOLE: Non-marking rubber outsole with coral reef lug design for added grip.