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This cat flap is insulated and comes with a double-flap mechanism and offers a good amount of protection in various climates. It can be fitted in wood, uPVC, glass, and steel doors. A tightly sealing door is essential, especially in colder weather. It keeps warm air from being sucked out and cold air from entering, saving money on energy costs. Wind Resistance Covering your cat's flap for winter can help keep your home warmer by stopping cold air from getting in and keeping warm air within. The best options are t