this handy bag returns to the level of the ancient traditional heavy and cumbersome plastic cage the strap allows to wear this shoulder bag, the comfort is unparalleled my cat, which is not at all a kitten, has literally adopted I had more trouble with the lock switch from my old cage system, the zipper system seems much safer Only negative point, the bag folds much under the weight of the animal, but it is not really annoying I highly recommend !!