DESIGN: Square toe Rocker heel 1 1/2" The Durango® X-Pand System™ is a hidden gore expansion for a universal fit and easy on/off IN-SHOE COMFORT: The Durango®o X-treme Comfort Footbed™ with memory foam has three times the flexibility, cushioning, and support. This lightweight and durable silhouette provides extreme comfort by forming to the shape of your foot for immediate gratification Dual-density EVA midsole Rolled shank area Fiberglass shank DURABILITY & TRACTION: Waterproof membrane I75/C75 Impact tested Protective toe Our electrical hazard boots meet and exceed ASTM electrical hazard standards Durango® waterproof construction fuses a waterproof inner layer to the shoe upper providing a barrier that keeps water out. The waterproofing lines the entire boot, ensuring complete protection Built with an outsole design and materials that help provide slip-resistance and traction on various surfaces