I bought a backpack for my Maltese. The backpack is large enough that you can still do a blanket with pure. The backpack can be opened on both sides, so the dog can go inside yourself, but you can also open up the zipper. On one side is a fixed ventilation grille on the other one, which you can open separately, so that the little one sometimes can rausstrecken head. So to open a ventilation grille is also available at the upper entrance. So for the price of the backpack is simply awesome. The only thing that bothered me were the zippers. I can recommend the jerk thing as beginner model a lot, because why would you spend more money if you still do not know whether the thing is also utilized or accepted by the animal.