The Plexiglas Weather Insertion is a great option. This insert is sometimes needed during hard rains and extremely cold temperatures. It keeps the weather out of the box nearly 100%. This is a custom piece of Plexiglas cut to an exact measurement with knobs to enable easy insertion into the solarium. The Weather Enclosure allows your cat the ability to enjoy the Solarium year round without your cat getting cold. In the photos, we still have on the film protector. It keeps it from breaking during shipping. You’ll just peel that off.