The Woody Max 16 inch boot from Muck has breathable Airmesh lining and a stretch-fit top that hugs the boot to your calf. It has a seamless easy-to-clean overlay, added toe protection, an instep protector, and additional achilles overlay protection. A CR flex-foam bootie with four-way stretch nylon is snag-resistant and waterproof. Its durable molded rubber outsole gives excellent stability, It also adds a fleece lining and a thermal foam underlay in the instep area for additional warmth.