It is hard to say. I think I get seen better wearing hi-viz, but I can't be sure. Even if the hi-viz increases the percentage of drivers who notice me from 50% to 51%, that ain't all bad. I prefer an orange hi-viz jacket in areas with a lot of greenery, and lime yellow in urban or brown country. The Class 3 with sleeves is even more visible than the usual Class 2 vest. I was driving early before sunrise recently near a rider with the reflective stripes on his vest, and he was easy to see.