With a vest harness that I’ve had before it was too big for its smallest size and was able to get out of it. It only had the belt at the chest to be adjusted and not the neck too. This one it was nice to adjust the two, fits her nicely, and didn’t get out of it. I love the colour and it suits her well. I don't need need the leash as I have one for her that's a retractable one so she has a lot of room to wonder around and not restricted to the length of the leash. I wonder how many others think or do this too.