The new Dublin Evolution Zip Front boots are made from European full-grain leather and feature a synthetic leather sole with RCS memory foam for ultimate comfort, as well as a molded side wall for added support and ankle protection. The leather lining provides extra durability, and the YKK zipper ensures longevity and easy on-and-off. The leather tongue is adorned with a brand logo. The rubber outsole is designed for grip and durability. RCS Memory.