OK, I have seen all these new "UV" products out there. What I want to know is, has anyone any proof, or has done a personal study on this. I mean has anyone taken a fly pattern without UV and thrown it for a week and the switched to the same pattern with UV and duplicated the same fishing conditions with different results. Should I never buy regular colors again and always buy UV dyed products from now on. Like I said I want proof not a commercial. I don't want to be sent to an article by a guy that works for the company that sells the stuff. I want information from real every day fisherman. DOES IT REALLY MAKE A BETTER FISH CATCHING FLY! If so..Why? Keep in mind, like many of you out there I have invested hundreds, and I'm sure thousands of dollars on materials in the past that are not UV. I hope I don't have to start all over again buying all new materials that are UV.