Expandable：Based on ordinary cat dog carrier bags, it will increase the expansion space.After expansion, the interior space will increase by 90%, don't worry about pets uncomfortable in your backpack.FoldableFoldable：When you don't need to use it, the folded cat small dog backpack takes up very little space.High Quality Material：Made of Oxford cloth and high density PVC, scratch and bite resistant, don't worry if your pet will damage the interior and will not hurt your pet.It adopts a lock-type zipper to prevent pets from opening it.With smooth zipper, easy to open and close, durable and practical.Our pet travel backpack has multiple uses.It can serve as a home for the animal's daily life, as a travel seat for the car, as a support for walks, for the animal's rest outside.Ideal for going out with pets, partying, shopping, hiking, train/car/plane travel.