UTC’s Ultra Thread is a specialized fly-tying thread designed specifically to enhance tying performance. Unlike generic threads, Ultra Thread’s nylon material was chosen for its stretch and gripping ability, which allows better tension control and more vibrant color options. The thread’s flat, lightly twisted structure helps it lay smoothly on hooks, reducing bulk—particularly beneficial for tying small flies and working near the hook eye. Additionally, the thread is lightly waxed for a smooth feel, allowing head cement to penetrate thoroughly for added durability. Its non-bonded, multifilament design is ideal for delicate split-thread techniques, and it is spooled on specially designed bobbins for easy use and color identification.

• Closest equivelant: 8/0
• Best for smaller flies (12-20)