Dennis Potter, a fly fisher and tyer from Michigan swears by OPAL TINSEL for the abdomen on nearly all his mayflies and caddisflies in leiu of dubbed bodies and swears it out-fishes similarly dressed dubbed body flies 10 to 1.

Anybody have thoughts, comments or experience with this stuff?

Does LRO sell it? Potter claims it sorta "glows green".

Seems that upon review of my dry fly boxes I don't need any "replacement" flies but if opal tinsel bodies make such an enormous difference in fish catching I'll dump them in the wastebasket.