That is a brand of reptile enclosures. They have sliding glass openings or doors and are made of some type of plastic, so they are very light. The problem I have heard some people dont like them is because of their dimensions and the fact that they dont stack. Personally i like them alot, some dont. I have an older one, they stopped making them a while back and have started again in the last few years. The new ones are a little different but generally the same thing, I could take a pic of mine later if you would like.