About this product
Ultra Thread's slim, round, multifilament build lays flat instead of stacking bulk, so matching denier to the hook is what matters most: 70D for size 14 and smaller, 140D for sizes 6–14, and 210D for streamers and big saltwater flies.
Specifications
- Available In: 70, 140, and 210 denier, in a wide color range
- Spool Length: 100 yards
- Construction: Multifilament nylon, round cross-section, waxed with a slight twist
- Breaking Strength: 70D ~1 lb · 140D ~2 lb · 210D stronger still
Best for: 70D on size 14 and smaller flies (comparable to Danville 6/0), 140D on sizes 6–14 (comparable to Danville Flymaster+ 140), and 210D on streamers, saltwater, and big predator patterns — all three handle split-thread techniques and dubbing loops.
The waxed finish carries a slight twist that holds wraps secure and cooperates with split-thread techniques and dubbing loops rather than fighting them. 70D is comparable to Danville 6/0, and 140D to Danville Flymaster+ 140, for tyers matching a familiar diameter. The color range covers both subtle, natural patterns and flashier attractors without switching brands.
Description supplied by J. Stockard Fly Fishing through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.





