Product is long, heavy plastic strips made for the Outback Dog House which screws in above the door and hangs down (note: if you already have the dog house put together, you will have to take off the roof to install this product). I bought this door to protect my cats from the wind coming in the door in the winter. The slats often don't hang straight down -- they get caught up behind one another and hung up on the bedding in the house, but I guess something is better than nothing. I am always straightening them. It affords the cats easy entrance and exit to the house while providing some wind break.