If you want to tie glo bugs, and don't have days to figure out how to do it with glo bug yarn, use Mcfly foam. Its spongy, which allows you to get your thread wraps close and tight to the hook, which is key to making glo bugs. I still scrap about every 5th glo bug tied with yarn but with Mcfly foam they seem to come out right every time. The down side is that you go through the material much faster than yarn, so it gets spendy quick. Also, glo bug yarn comes in a lot more variety of colors, which is nice. I think Mcfly foam comes in 12 or so colors but I only find one of them useful for steelhead egg paterns.
Pros: Lightweight, Versatile
Cons: Durability and colors
Best Uses: Fly Fishing, Freshwater Fishing
Would you recommend this product? Yes