Upper: Natural Rubber. Lining: Recycled Polyester. Insole: Latex, Latex Foam, Recycled Polyester. Outsole: Rubber, Textured. Handcrafted, Zigzag Overlay. Fabric Technology: Waterproof. Flat. Cut: Mid Calf. Design: Dinosaur, Logo. Finish: Matte. Toe Style: Round. Fastening: Slip-on. A product of great quality!