Design: Engineered air mesh with 100% rPET yarns Recycled polyester materials in collar, mesh, and laces Extended heel designed for smooth impact Late stage Meta-Rocker adds stability to every step Anatomical Achilles construction Ultra-ventilated upper Heel pull loop for ease of entry In-Shoe Comfort: Molded PU sockliner with 50% soybean oil Compression-molded foam midsole for comfortable all-day wear Durability & Traction: Vibram(R) Megagrip rubber outsole with 5mm lugs for reliable traction on the trail