We've had our original trusty PerfectFit harness for a good four or five years and it's still in perfect condition. However, recently we'd been thinking about a colour change to match our girl's Muzzle Movement muzzle, as we want her to look bright, noticeable, and non-threatening (even though we want people to give us space). I was able to buy a new top section for her existing harness, making it incredibly affordable. It took a matter of seconds to swap the colours over. I'm planning to buy a few different colours, so we can mix and match. This will be especially helpful over the winter when she insists on rolling in muddy puddles, as she can be wearing one colour while I wash another! Thanks for the great quality, ease of use, and speedy dispatch!