After I got a dog we spent a lot of time outside. I started to feel guilty about not spending as much time after work (plus my cat loves the dog and wanted to hang out more with her sister). I bought this carrier because I could put it on my back and it has been perfect. Now, when I go for walks with my dog I just put my cat's favorite blanket at the bottom and put my cat on m back. She loves it. She actually hates going outside unless sheltered so this is the perfect medium. There's also the roller for when she wants to be at ground level or I'm carrying treats on my back from our favorite pet shop.