Fly Tying 1 min read

[Video] How to Tie the F-Fly with 2 Simple Materials

Ken Sperry

Posted by Ken Sperry

February 2, 2024


Marjan Fratnik was born in 1919 near the confluence of Slovenia’s scenic Soča and Idrijca rivers, where he would develop his love of fly fishing and tying. Though his patterns were simple, Fratnik found genius in simplicity, creating flies that were both effective and elegant.

None would become more famous than his signature “F-Fly.” Deceptively basic in design yet irresistible to trout, the F-Fly has become synonymous with Slovenian fly tying. To this day it remains one of the most popular patterns worldwide.

In his latest video, renowned tyer Tim Flagler of Tightline Productions pays homage to Fratnik’s creation. Flagler demonstrates tying the impressionistic F-Fly, using it most effectively as a caddisfly imitation. But those familiar with Fratnik know this fly transcends any one insect, its low-riding form enticing trout across seasons with its versatility.

F-Fly Material List

Hook: Fulling Mill FM50 25 (3X-short dry-fly hook), size 16
Thread: Black, 8/0 or 70-denier
Body: Natural Beaver fur
Wings: Natural dun CDC
Head: Black tying thread
Adhesive: Head cement