Amor Flex Energy Efficient pet doors are a revolutionary advance in pet door technology. New Armor Flex pet doors provide the highest level of energy efficiency providing an air tight seal that withstands high winds， rain， snow， extreme cold and heat with guaranteed zero drafts. The secret is in the patent pending flap. Individual interlocking segments provide horizontal rigidity to fully compress seals around the opening， keeping out wind and dirt， while providing vertical flexibility so your pet can pass through easily and safely. Armor Flex doors install quickly and easily in any door or wall and are available in 4 sizes from small to extra-large. The Tamper-proof security panel provides the highest level of home security. Made of durable， attractive heavy gauge aluminum with bullet-proof composite flap， Armor Flex pet doors are made to last a lifetime. Give your home the quality， security， safety and energy efficiency of an Armor Flex pet door.