Men’s Olukai Na’i WP Size 9 Shoes -Brand New -Originally $140 DROP-IN HEEL®: Versatile Drop-In Heel® offers both a shoe and slide functionality. WATER READY: Lightweight, quick-drying, breathable and durable materials built for in and around water. WATERPROOF LEATHER: Leather that has been made specifically to prevent the entry of water and provide protection from the elements in any season.