Easy clean uppers with waterproof, lightweight construction I'm green bio-based EVA ( over 50% ) which is lightweight and durable Removable energy return EVA footbed with Dansko Natural Arch technology for added support Textile footbed treated for odor control Strategically placed lightweight rubber outsole pads for durability and lasting wear The waterproof Karmel rain boot can take you anywhere, rain or shine. The Karmel uppers and removable footbed are made from over 50% I'm green bio-based injected EVA, making it lightweight and durable, and easy to clean. The footbed is cushioned and features Dansko Natural Arch technology for added arch support, and the channeled outsole provides durability and long-lasting wear. This is a waterproof rain boot that feels great and is made from materials you can feel good about.