This is XTRATUF's first Eco-friendly Ankle Deck Boot builds on their heritage and what they do best with the addition of Yulex, the World's first plant-based replacement for our standard neoprene. This lightweight silhouette features the XTRATUF signature non-marketing, slip resistant Chevron outsole. The ECO is 100% waterproof built with Yulex, a natural rubber derived from the sap of the Hevea Tree. This boot is equally as durable, flexible, and comfortable as the original Ankle Deck Boot.