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This double-flap cat flap that is insulated provides excellent protection in all climates. It can be put in wood, uPVC and glass doors. It is essential to have a door that can be sealed tightly, especially during colder weather. It prevents warm air from being sucked out and cold air from getting in and causing energy costs. Wind Resistance By preventing cold air from entering your home and keeping warm air inside, a cat flap cover will keep it warmer. Most of the best options are insulated and come with a magnetic seal to sto