Specially designed insole to reduce foot fatigue. Closed tongue design for better resistance to water penetration. High level of ankle support. Curved topline for better fit and flexibility. Quick release zipper for instant access. Heat resistant outsole 300ºC. CE certification. Composite toe stiffener. Composite anti-sole puncture sole plate. Insulation against cold down to -17°C. Energy absorbing heel. Waterproof membrane for dry foot comfort. SRC - Slip-resistant outsole to prevent slipping and tripping on ceramic and steel surfaces. Fuel and oil resistant outsole. Double-layer sole construction. Insulation against cold. Antistatic footwear. Wide fit. Suitable for use in ESD environments.