No matter the weather, we’ve got your door covered. The Extreme Weather Sliding Glass Pet Door™ Replacement Flaps are designed to keep out chilly winter air or keep in air conditioning during the summer. An insulated flap is surrounded by a vinyl flap on each side to ensure that rain and drafts don’t find their way into your home. Magnets at the bottom of replacement flaps ensure the pet door will stay closed. Install new replacement flaps on your Extreme Weather Sliding Glass Pet Door™ in 3 quick easy steps. Replacement flaps are available in 2 sizes, medium and large, to fit your current PetSafe® Extreme Weather Sliding Glass Pet Door™. Trust PetSafe® to keep your pet healthy, safe and happy.