I got this harness together with the Lupine leash because I was planning to travel with my cat and I needed something to restrain him so he wouldn't run away. Well, this harness worked perfectly. I got the smaller size (my cat is only 9 lb) based on the measurements provided by the seller and the harness fits just fine. The first time I put this on my cat, I had left the front loop a little loose (the one that goes around the neck) and he managed to get his paw stuck in it, probably trying to scratch himself and/or to remove it. I recommend you keep the loops tight to prevent this kind of accidents. He does not mind the harness at all, which is great! The clips are easy to open and close and the material seems quite durable. I recommend it!