McFlyfoam by Hareline
A strong, stretchy, continuous filament yarn that is dyed with colorfast dyes to prevent fading. This yarn is designed for ease of use, making it simple to tie, cut, and trim for egg patterns and sculpted fly designs such as sculpins and woolheads.
Product Features
- Colorfast dye treatment ensures lasting color integrity
- Highly stretchy and strong for durable fly construction
- Easy to tie, cut, and trim for precise shaping
- Ideal for egg patterns and sculpted fly designs like sculpins and woolheads
| Feature | Detail |
|---|---|
| Yarn Type | Continuous filament |
| Dye Type | Colorfast dyes |
| Best For | Egg patterns, sculpins, woolheads |
| Usage | Tying, cutting, trimming |
FAQ
Is the yarn suitable for all types of fly patterns?
The yarn is especially well-suited for egg patterns and sculpted flies like sculpins and woolheads due to its stretch and ease of shaping.
Does the color fade over time?
No, the yarn is dyed with colorfast dyes that prevent fading, ensuring consistent color performance.
Can this yarn be used for tying small, detailed patterns?
Yes, its easy-to-cut and trim nature makes it ideal for small, detailed fly construction.




Deirdre Jones –
The yarn is very easy to work with. I used it to make sculpin flies and found the stretch and strength perfect for the shape. Colors stay vibrant even after several uses in the water.
Lily Jackson –
Great for beginners and experienced fly tiers alike. The colorfast dye keeps the hues bright, and cutting is smooth without fraying. I’ve made multiple woolhead patterns with no issues.
Anna Hughes –
Works well for egg patterns. A bit stiffer than some other yarns, but the strength and color retention are excellent. Slightly more expensive, but worth it for durability.
Samantha Avery –
I’ve used this yarn for several fly designs and it holds up well in the field. The ease of trimming and tying makes it a go-to for quick pattern changes.