Hareline McFlyfoam - Durable Elastic Filament Yarn for Fly Tying

Meet McFlyfoam by Hareline

McFlyfoam is a robust, elastic, continuous filament yarn designed for fly tiers who value reliability and ease of use. Dyed with fade-resistant dyes, it keeps colors vibrant through long tying sessions and varied water conditions. The yarn feels smooth in the hand and behaves predictably as you work, giving you confidence from first wrap to final trim.

What makes McFlyfoam stand out

• Durable, stretchy construction you can feel as you tie and trim.
• Colorfast dyes resist fading under bright lights and long days at the vice.
• Simple to tie, cut, and trim, making eggs and sculpted patterns quick to execute.
• Versatile for both freshwater and saltwater patterns, expanding your pattern library.

Use cases and pattern ideas

Imagine nailing a row of lifelike sculpins or crafting clean woolhead flies with minimal effort. The continuous filament provides a smooth, threadlike flow that helps you build texture without fraying. Its elasticity supports shaping without sudden snaps, even when wraps become snug, giving you room to refine body contours and color transitions.

For egg patterns, McFlyfoam offers reliable control and a clean silhouette, while sculpted bodies benefit from a steady, uniform diameter that keeps each segment distinct. Whether you fish stillwaters or coastal waters, the yarn remains consistent from head to tail, helping your flies maintain a polished finish across the pattern.

Tips for best results

• Wrap tightly but avoid over-tension; let the yarns stretch and settle as you work.
• Trim cleanly after each wrap to preserve a tidy final look.
• Store in a cool, dry place away from direct sunlight to preserve color and fiber strength.

Product snapshot

Brand: Hareline • Product: McFlyfoam • Type: Elastic continuous filament yarn • Ideal patterns: Eggs, sculpins, woolheads • Water compatibility: Freshwater and saltwater