We live in two places and fly with our cat. We can expand it out during layovers. Love the portable litter box. We just bring a zip lock full of litter and a litter box liner. We toss it all before the flight. Our cat has gotten so used to the carrier, he sleeps in it at home. We are also able to lay it on its side and it will fit perfectly under the airplane seat (middle seat often has a little more space). So glad we found this brand!

Great design for travelers! Worked great for our two kittens

The backpack is as the description. It works great as a backpack and carrier.

I love the backpack! I have two small chihuahua's and they have a lot more room then their old backpack. It's also nice I can extent it when we have stopped for a while.

My 3-year old cat isn’t fond of going on walks and trips in his backpack, but I now think it was because the one he’s had (the kind with the bubble in the middle) was too cramped for him. As soon as I put the pidan bag on the floor, he instantly took to it and began hiding and playing inside of it! I have yet to use it with him in it on a walk, but so far it seems very spacious and sturdy—even for a 14 pound tabby!