Keeps out the cold

We have 15 cats that use the door – all have adjusted even our calico that only has one eye and that eye has a scar – she doesn’t like new things since she can’t see very well.

With all these cats go in and our old door let in some such cold air I had to close it down most of the winter – so far so good even on windy days. Only time I’ve had to close it if it’s windy and the cat goes thru slowly. But once It’s closed no air comes through.