Our pet doors are designed to be safe, secure and comfortable for your pet. Rather than using hard plastic or two pieces of flexible plastic or any tinted plastic, our flaps are made of clear, flexible vinyl that easily swing in or out when your pet pushes on them. And because our flaps are in one piece, there is nothing for your pet to get caught on as they use the door, even if they change their mind partway through. The magnets hold the flap securely but still gently enough that your pet should have no trouble opening the door.