Weight Capacity: 15kg I tested it indoors with a 10kg dog. I was able to lift it as a backpack, and move it as a carrier. I felt that my dog seemed a bit cramped in terms of size, so I think it's suitable for small dogs or cats. Since I put a dog in it once, there is some pet hair and odor. There is no box or instruction manual. It will be folded and shipped. For details, please search for "Versatile! Pet Carrier for Cats/Small Dogs, Weight Capacity: 15kg" as I believe there are similar products.