I tried other cat approved harnesses on my kitty and she would back out of them or get all tangled up. She would freeze up and not move because they would tighten up in places as she moved about. This harness she waits patiently for me to put it on her, sometimes it is hard to figure out how it goes on, but she sits real still. Once outside she chases bugs and the wind and moves like she isn't wearing anything. I love to watch her relax in the sun with my morning coffee.