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This double-flap, insulated cat flap is a great protection for all climates. It can be fitted in wood, uPVC, glass, and metal doors. It is essential to have a door that can be sealed well, especially in cold winter months. It prevents warm air from being sucked out and cold air getting in which can save you money on energy costs. Wind Resistance Covering your cat's flap for winter can help keep your home warmer by preventing cold air from entering and allowing warm air within. The be