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This double-flap cat flap that is insulated is a great protection for all climates. It can be installed in wood, uPVC and glass doors. It is important to have a door that seals tightly, especially during colder weather. It keeps warm air from being sucked out and cold air from getting in which can save money on energy costs. Wind Resistance By preventing cold air from entering your home and allowing warm air in, a cat flap cover will keep it warmer. The majority of the top options are insulated and have a magnet