Choosing the right fly-tying thread can make a real difference to the finished fly. In this video, InTheRiffle compares several popular threads, including UTC 70 and 140 denier, UNI 8/0 and 6/0, Veevus 8/0 and UNI Trico 17/0. The demonstration highlights how each thread behaves on the hook, from flat, floss-like threads that create smooth bodies to rounder, cord-like threads that build bulk more quickly.
Whether you’re tying tiny midges, delicate dries, nymphs or larger streamers, understanding the differences in thread thickness, strength and fraying resistance can help you choose the right thread for the job. Watch the comparison and discover which option best suits your tying style.
Check out this handy comparison of popular fly tying threads.
