From Seavees: "Besides being the most exciting thing in your closet, these clogs are also designed to be worn while doing the things you love most. Crafted from natural rubber and engineered to be 100% waterproof. Finished with a pull tab featuring the same heritage webbing design as our shoes from the '60s." Upper: natural rubber (100%) Lining: moisture wicking recycled polyester Insole Cover: recycled cotton (60%), cotton (40%) Insole Type: memory foam footbed Outsole: recycled natural rubber (10%), natural rubber (90%)