This dog pen is cleverly constructed to open and fold in seconds and store in a very small space, as well as having pockets for all the parts and a carrying case to transport it.  It's sturdy enough that our bulldog puppy cannot escape even with the roof off. If you need a pen that's portable and roomy, this is your answer.  It's a bit smaller than I thought it would be, so make sure you get one large enough to afford your dog the room he needs to be comfortable.  You won't be disappointed in this product.