Hareline McFlyfoam: Strong, Stretchy Continuous Filament Yarn for Flies

Overview

Hareline McFlyfoam is built for fly tyers who value reliability and ease. This strong, stretchy continuous filament yarn stays smooth as you build eggs or sculpted bodies, resisting snags and fraying while you wrap and trim with confidence.

Feel and performance matter, especially during early mornings or late-night sessions. McFlyfoam offers a steady glide and slight elasticity that helps you adjust tension as you form delicate heads or tapered bodies, reducing rough spots and uneven wraps.

Dyed with colorfast dyes, McFlyfoam maintains its hue through water exposure and sun, helping patterns retain their visual edge over time. The color stays vibrant even after handling and frequent trimming, keeping your flies looking polished from start to finish.

Designed for easy tying and trimming

The yarns streamlined formulation supports quick, controlled tying and clean trimming. It shines for small egg patterns and broader sculpted shapes like sculpins and woolhead flies, letting you shape heads and bodies with precision and minimal effort.

• Strong and stretchy continuous filament yarn that holds form
• Colorfast dyes prevent fading for longer-lasting color
• Easy to tie, cut, and trim, even in tight spaces
• Ideal for eggs and sculpted patterns like sculpins and woolheads

Real-world use cases

Use McFlyfoam when you want crisp bodies, durable wraps, and clean heads on eggs, nymphs, and sculpted patterns. The stretch helps secure wraps in tight spots and reduces fraying during trimming.

• Maintain consistent tension for even wraps
• Pair with compatible hooks, beads, and threads
• Store away from direct sunlight to preserve colorfastness

What you can expect

Results vary with technique, but many anglers report quicker tying sessions and more consistent heads on woolheads and sculpins when using McFlyfoam. The combination of strength, stretch, and colorfast color makes it a reliable option for a range of patterns.