Semperfli Black Floss 2／0 400D Black – Fly Tying Materials
Nick Whelan 
# **Kylebooker Semperfli Black Floss 2/0 400D Black – Fly Tying Materials: Is It Worth the Investment?**
Fly tying is an essential skill for any dedicated angler, and the quality of materials used can make a significant difference in the effectiveness of your flies. One product that has gained attention among fly tyers is the **Kylebooker Semperfli Black Floss 2/0 400D Black**. But how does it perform in terms of quality, durability, and overall value for money? In this review, we’ll break down its features and assess whether it’s a worthwhile addition to your fly-tying toolkit.
## **Overview of the Product**
The **Kylebooker Semperfli Black Floss** is a high-density (400D) polyester thread designed specifically for fly tying. The **2/0 thickness** makes it suitable for a variety of fly patterns, from small nymphs to larger streamers. The deep black color ensures excellent visibility in the water, which is crucial for attracting fish.
### **Key Features:**
– **400D High-Density Polyester:** Provides superior strength and durability.
– **2/0 Thickness:** Versatile for different fly sizes.
– **Smooth Texture:** Reduces fraying and ensures even wraps.
– **Consistent Color:** Deep black shade that doesn’t fade easily.
## **Performance and Durability**
One of the most important factors in fly-tying materials is durability. Weak or fraying thread can ruin a fly before it even hits the water. The **Semperfli Black Floss** excels in this regard—its **400D polyester construction** ensures that it withstands tension without breaking. Unlike some cheaper alternatives, this thread maintains its integrity even when tying tightly wound patterns.
Additionally, the smooth texture allows for **clean, even wraps**, reducing the risk of thread bunching or snapping mid-tie. This is particularly useful when working with delicate materials like CDC or fine dubbing.
## **Versatility in Fly Patterns**
The **2/0 thickness** makes this thread a great all-rounder. It’s thin enough for small dry flies yet strong enough for larger streamers and saltwater patterns. Whether you’re tying **midges, nymphs, or articulated flies**, the **Semperfli Black Floss** holds up well under different applications.
Another advantage is its **color retention**. Some threads fade or bleed when wet, but this product maintains its deep black hue, ensuring your flies remain visually effective over time.
## **Price vs. Value**
Fly-tying materials can range from budget-friendly to premium-priced. The **Kylebooker Semperfli Black Floss** sits in the **mid-to-high price range**, but its quality justifies the cost. Compared to cheaper alternatives, it offers:
– **Better knot strength** (less likely to snap under pressure).
– **Longer-lasting spools** (less waste due to fraying or breakage).
– **More consistent performance** (smoother tying experience).
If you tie flies frequently, investing in a high-quality thread like this can save money in the long run by reducing material waste and improving fly longevity.
## **Potential Drawbacks**
While the **Semperfli Black Floss** is an excellent product, it may not be the best choice for absolute beginners due to its slightly higher price. However, intermediate and advanced fly tyers will appreciate its reliability.
Another minor consideration is availability—since it’s a specialized product, it may not be as widely stocked as generic brands.
## **Final Verdict: Is It Worth It?**
If you’re serious about fly tying and want a **strong, durable, and versatile thread**, the **Kylebooker Semperfli Black Floss 2/0 400D Black** is an excellent choice. While it’s not the cheapest option, its performance and longevity make it a **cost-effective investment** for dedicated anglers.
### **Pros:**
✔ High strength and durability
✔ Smooth, consistent wrapping
✔ Excellent color retention
✔ Suitable for various fly patterns
### **Cons:**
✖ Slightly more expensive than budget threads
✖ May be harder to find in some stores
### **Rating: 4.7/5**
For those who prioritize quality in their fly-tying materials, this thread is **highly recommended**. Whether you’re tying delicate dry flies or robust saltwater patterns, the **Semperfli Black Floss** delivers reliable performance, making it a solid addition to any fly tyer’s arsenal.
Would you give it a try? Let us know your thoughts in the comments!