I designed this fly two years ago once I started euronymphing. After I had seen the famed Pliva Perdigon, I wanted a perdigon style fly that fit my needs. I fish the spring chicken with an oversized bead to get down quickly. Usually in sizes 16 thru 20. If you are into euronymphing, I have a feeling this will become a staple fly in your box. For me this is a staple on my euronymphing setup. These flies are tied to order.