Our Customized Bunker Systems are Waterproofed, Steel/Concrete shelters overbuilt to heavy duty specifications in order to withstand whatever the future can throw at it. It has all the major comforts of home to keep your family safe in the event of a disaster along with our embedded proprietary Doomsday Property Proprietary Protection System (DPPPS). We are also constantly innovating and improving our models and will have more models available to choose from soon! Please contact us to learn more about the K2 Mammoth 4 Bunker System.