This green cat carrier bag is made of high-grade polyester and mesh, which will not cause the top to collapse.It is firmly structured,and strong enough to stand up to the scratches or gnawing of your pets. You can easily fold up your cat carrier backpacks when not in use and it will only take up very little space. This pet travel carrier can be conveniently worn over the shoulders, secured in a vehicle with a seat belt, positioned on your luggage, or carried using the top handle. This cat travel carrier is firmly structured, providing ample room for your pet to move around.