Black, 8/0 or 70-denier Thread.

Black Thread (8/0 or 70-Denier) is a fine, strong fly-tying thread ideal for small, precise patterns where control and a clean profile are critical. Its thin diameter allows for tight wraps without adding bulk, making it especially well-suited for midges, emergers, and slim nymphs.

The black color provides excellent contrast and definition while blending seamlessly into most dark-bodied patterns. Available as 8/0 or 70-denier, this thread offers a reliable balance of strength and finesse, enabling secure material tie-ins, smooth tapers, and consistent, professional-looking flies.