The OluKai Men's Na'I Waterproof Casual Shoes delivers the perfect combination of casual lifestyle and technical comfort. Offering the protection of a boot with the relaxed ease of a slip-on, these shoes feature a full waterproof construction and breathable membrane, Big Island footbed embroidery, durable heel pull loop and elastic gore panels for an easy on/off. The Drop-In Heel® design offers both a shoe or a slide functionality.