The Tirra will give you the freedom you need in a sandal. Synthetic upper is quick-drying. Neoprene foam and stretch mesh lining. Microban Zinc anti-microbial protection. Cushioning sponge EVA topsole. EVA midsole for extra cushioning and comfort. Molded nylon stability shank. Shoc Pad in the heel absorbs impact. Spider Rubber outsole: A patented process produces Teva's most versatile rubber compound that successfully blends high friction and good durability for slip-resistance.