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This cat flap is insulated and features a double-flap design and provides a high level of protection in a variety of climates. It can be put in wood, uPVC and glass doors. A door that is tightly sealed is crucial, particularly in colder weather. It prevents warm air from getting sucked out and cold air getting in and causing you to pay more energy costs. Wind Resistance By preventing cold air entering your home and allowing warm air in the home, a cat flap cover will