The bright yellow grabs attention along with the dark contrast of the letters. As far as the vest is concerned, it feels a bit weak and I don't feel that they would last long if used extensively.  I have donated a few to a shelter where I volunteer. For dogs that pull strong, I either use a stronger vest along with this one for advertising, or along with a choke chain.  In either case, I don't rely on the vests loop unless you have a very well behaved dog or one that is very small.