Sherpa 2-in-1 Travel Pet Backpack

We were traveling with a Corgi who is very long. She is 8 months, 17 lbs. and needed the entire (end to end) expandable section to be comfortable. While carrying her, she was a little cramped but once we used the extendable area, she was much more comfortable. It was a tight fit under the airplane seat.The construction of the unit was well designed with the exception of the zipper on the extendable section. All other zippers had a safety latch on them, but the extendable zipper did not. Our girl is very smart and easily figured out how to nudge it open. We made sure that this zipper area was blocked. The materials used were very sturdy and durable. As our furry companion is still a puppy, she was digging at the mesh area, and it held well.If there one thing, I would change would be to make the entire unit square. The side facing out has a curve to it. Making it square would give your pet just a tad more room. As we tried several, this was the best fit for us and our Corgi.