The Tuffking Knox is a metal free safety boot with an innovative 8 inch zip made for emergency service personnel. Designed to be lightweight, comfortable and agile, for quick movement when on duty. The boot has a rear ankle flex combined with an EVA/Rubber outsole making these boots perfect for police and ambulance workers that require the movement when driving. The Tuff-Dry recycled waterproof membrane offers an eco-friendly and durable solution to wet conditions.