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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 is sealed tightly, particularly during cold weather. prevents warm air from being sucked away and cold air from getting in which can save you money on energy costs. Wind Resistance By blocking cold air from entering your home and keeping warm air in, a cat flap cover will keep it warmer. The best options come with a magnet seal a