I found this pattern several years ago when fishing the Missouri River, since then, this fly has been a staple fly for the many caddis rich rivers we fish in west. A fantastic nymph to use when running through the riffles, or dragging behind a dry if that is your thing. Pattern does not require many materials, and is very simple to tie. Get a row in you caddis box going.
Bloom's Tungsten Dart
Hook: TMC 3761, Sz: 12 - 16
Bead: Silver Tungsten
Thread: Tan 8/0
Body: Golden Brown UV Ice Dubbing
Soft Hackle: Natural CDC
Collar: Golden Brown UV Ice Dubbing