OLUKAI Kulapa Kai (Toddler/Little Big Kid) Synthetic Synthetic sole Ready for any playground, our Kulapa Kai packs a punch of color and comfort, a vacation for your little one's feet. Sporty, beach-ready design with a soft nylon toe post. Non-marking rubber outsole with coral reef lug design for added grip. Anatomical compression-molded EVA midsole with a soft ICEVA drop-in footbed for comfort and support. Our vegan friendly footwear offers the durability, traction and support you expect from OluKai while using 100% high-quality synthetic materials, 0% animal products. Lightweight, quick-drying, breathable and durable materials built for in and around water/ Our thermoset rubber is a compound of natural and synthetic rubber that will not leave marks or scuffs on surfaces of any type. Our gum rubber outsoles, as a natural material, will always naturally be non-marking.