Cats backpack is made very stable and good. Maybe something to klrine floor space. I always put the backpack then the train to the side so that my cat has more space. For a normal weight cat it is large enough. My Carthusian cat that has something overweight might still use a few centimeters of space more, or a few kilos less. The carriers are more appropriate to a wider back. As they slip a thin person often down times. Nevertheless, a great backpack.
