PetSafe Extreme Weather Dog Doors will keep the weather and elements outdoors, while allowing your pets to come in. The Extreme Weather Dog Door's 3-flap system allows for up to 4.5 times more efficient energy usage than a traditional 1-flap dog door. Whether it is cold, heat, rain, snow, or even bugs- these Extreme Weather Pet Doors will give you the control to keep them out of your home. These doors are easy to install and fit on most doors 1.5" to 2" wide. An additional snap-on weather shield gives you the ability to add protection in extreme cases such as a blizzard, tornado, or hurricane. No matter where you live, weather in 115 degree heat, or 15 degree cold, the PetSafe Extreme Weather Dog Doors can keep the weather out of your house. All doors come with a One Year Warranty