Semperfli Spyder Thread Dark Brown by TIEMCO | Ultra-Thin Micro Fly Tying Thread

Overview

Introducing TIEMCO's Semperfli Spyder Thread in Dark Brown — a specialized ultra-thin thread designed for micro fly tying. This 2-ply strand is easy to split, enabling you to create precise, hair-thin wraps on the smallest patterns. The 18/0 (30D) diameter signals a delicate profile, while the polyester construction balances finesse with strength, supporting clean wraps without excessive bulk.

What sets Spyder Thread apart is its non-waxed, lightly twisted construction. It sits flat on the wraps, reducing snags and allowing you to wind more consistently around tiny shanks. Because the thread is translucent, it blends into the body hue of the fly pattern rather than overpowering it, making it a flexible choice for a range of species and tactics. For midge and other minute patterns, this translucency helps maintain the pattern's natural silhouette, which many tiers appreciate when shaping delicate bodies.

Key features

• Ultra-thin, strong polyester thread designed for micro fly tying
• 2-ply construction that splits easily into two 50:50 strands
• Non-waxed, lightly twisted to lay flat on wraps
• 18/0 (30D) diameter with a break strength around 400 g
• Translucent color intended to blend with the fly pattern hue
• Can be used with any bobbin and on a long 100 m spool
• More robust feel compared to common alternatives like Uni Caenis and Danville Spiderweb

In practice, you’ll find this thread shines on tiny patterns where minimizing bulk matters. The ability to split into two equal strands gives you control over thread density, enabling neat, tight heads on micro dry and wet flies. The translucent finish means you can wrap over guides or ribbing without creating heavy tones that mask the body color. The long 100 m spool keeps your work sessions uninterrupted, whether you’re tying a dozen midges or a handful of micro nymphs.

Technical notes and practical uses

• Ideal for micro fly tying where body and ribbing require precision without added weight
• Supports delicate wraps for dry and wet fly patterns that benefit from a clean silhouette
• Compatible with various bobbins and whip finishes for versatile workflow
• Thinner profile helps minimize bulk on small hooks, aiding presentation

Additional benefits include a translucent finish that reduces color bias on small patterns, and a long spool that suits extended tying sessions. While results depend on technique and pattern, many tiers find Spyder Thread a reliable option for preserving delicate body shapes and achieving neat, controlled wraps on micro flies.