McFlyfoam Fly Tying Yarn is a polypropylene-based yarn. It comes in a wide variety of colors and has numerous uses. When not treated with a floatant, the yarn will absorb water and sink quickly. Uses Patterns and Tying Techniques - McFlyfoam can be used for indicators and para-posts on flies when treated with a floatant. It can also be used to create egg patterns and for crab flies. It serves as a substitute anytime yarn or wool is required. Comparisons McFlyfoam vs Hareline Polypropylene Floating Yarn - Both products are made of similar materials. McFlyfoam will sink when not treated and is available in more colors. Example Flies Patterns - McFlyfoam is most frequently used for egg patterns like the Glo Bug. It can also be used for parachute posts on dry flies like the Adams. The McCrab Fly is a saltwater crab pattern tied using McFlyfoam. Pack Size and Physical Description Approximate Dimensions - Individual fibers are roughly 6 inches in length. Pack Size - The pack is 6x3 inches and about a half-inch thick. **These sizes and dimensions may vary based on manufacturer changes**
