# **Kylebooker SEMPERFLI NANO SILK 30D – 18/0 GSP Fly Tying Thread – 15 Colors Available NEW! – Is It Worth the Investment?**
As an avid fly fisherman, I understand the importance of high-quality tying materials. The right thread can make a significant difference in the durability, appearance, and performance of your flies. Recently, I came across the **Kylebooker SEMPERFLI NANO SILK 30D – 18/0 GSP Fly Tying Thread**, which boasts an ultra-thin yet strong construction with **15 vibrant colors** available. But is it truly worth the investment? Let’s break down its features, performance, and overall value.
## **Key Features of SEMPERFLI NANO SILK 30D**
1. **Ultra-Thin Yet Strong (18/0 GSP)**
– The **18/0 denier** rating makes this one of the finest fly-tying threads on the market. Despite its thinness, it is constructed from **Gel-Spun Polyethylene (GSP)**, which provides incredible tensile strength.
– This means you can wrap tightly without worrying about breakage, making it ideal for delicate patterns like midges and small dry flies.
2. **15 Color Options**
– With **15 different shades**, this thread offers excellent versatility for matching natural insect colors or creating flashy attractor patterns.
– The colors are **UV-resistant**, ensuring they remain vibrant even after prolonged exposure to sunlight.
3. **Smooth & Tangle-Free**
– The **Nano Silk** coating ensures a smooth tying experience, reducing friction and preventing tangles.
– Unlike some traditional threads, it doesn’t fray easily, allowing for cleaner wraps and better head cement adhesion.
4. **Durable & Consistent**
– GSP threads are known for their **abrasion resistance**, making them perfect for saltwater flies or heavy-duty nymphs.
– The **consistent diameter** ensures uniform wraps, crucial for professional-looking flies.
## **Performance & Practical Use**
I tested this thread on various fly patterns, including **size 20 midges, parachute Adams, and streamers**. Here’s what I found:
– **For Small Flies (Size 18 and Below)**
– The **ultra-thin profile** allows for minimal bulk, which is crucial when tying tiny flies.
– Even with multiple wraps, the thread doesn’t overpower the hook shank.
– **For Larger Flies (Streamers & Saltwater Patterns)**
– Despite its thinness, the **GSP material holds up well under tension**, making it suitable for larger flies.
– It **binds materials tightly** without cutting through delicate feathers or dubbing.
– **Knot Strength & Durability**
– The thread **holds knots exceptionally well**, reducing the risk of unraveling.
– It resists **water absorption**, meaning your flies won’t weaken after prolonged use.
## **Price & Value for Money**
Compared to other premium fly-tying threads like **UTC 70 Denier or Veevus GSP**, the **SEMPERFLI NANO SILK 30D** is competitively priced. Considering its **strength, color options, and smooth handling**, it offers **excellent value for both beginners and experienced tyers**.
## **Final Verdict: Is It Worth Buying?**
✅ **Pros:**
✔ Ultra-thin yet incredibly strong (18/0 GSP)
✔ 15 vibrant, UV-resistant colors
✔ Smooth, tangle-free performance
✔ Excellent for both small and large flies
❌ **Cons:**
✖ Slightly more expensive than standard nylon threads
✖ Requires a gentle touch to avoid over-tightening (GSP can cut softer materials if pulled too hard)
### **Conclusion: A High-Performance Thread Worth Trying**
If you’re looking for a **premium, ultra-thin, and durable** fly-tying thread, the **Kylebooker SEMPERFLI NANO SILK 30D** is an outstanding choice. Its **strength, color variety, and smooth handling** make it a versatile option for all types of flies. While it may be pricier than basic threads, the **performance justifies the cost**, especially for anglers who demand precision and durability.
**Rating: 9/10 – Highly Recommended!**
Would you give this thread a try? Let me know your thoughts in the comments! 🎣