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This double-flap cat flap that is insulated provides excellent protection in all climates. It can be installed in wood, uPVC, glass, and metal doors. It is important to have a door that is sealed tightly, particularly during cold winter months. It helps prevent warm air from being sucked out and cold air from getting in which can save you money on energy costs. Wind Resistance Using a cat flap cover for winter can help keep your home warm by stopping cold air from getting in and keeping warm air within. Most of the best options are insulated and hav