Solitude's Beadhead Olive Crystal Bugger
Because it casts great and catches fish, this is one of our favorite and best selling trout spey flies. It doesn't hold water making it tough to cast like rabbit based flies.
It's also a great all around fly for lakes, rivers, and even saltwater for light salmon and sea run cutts. It is tough to beat an olive bugger. It has also claimed its share of Bass, Panfish, and all sorts of warmwater species as well.