Uni Big Fly Thread 400 Denier
360-400 denier waxed fishing thread, designed for durability and strong hook retention.
Available in 80-yard spools, each spool is carefully crafted for consistent performance in fishing applications.
| Specification | Detail |
|---|---|
| Denier | 360-400 |
| Finish | Waxed |
| Length | 80 yards |
| Origin | Made in Spain |
FAQ
Is this thread suitable for use with both freshwater and saltwater fishing?
Yes, the waxed finish provides resistance to moisture and abrasion, making it suitable for both freshwater and saltwater environments.
Does the thread have any specific knot strength or hook retention properties?
The thread does not slip on the hook and is known for its superior strength compared to standard competition threads.
What is the recommended storage condition for this thread?
Store in a cool, dry place away from direct sunlight to maintain the wax finish and prevent degradation.




Thomas Reid –
Used this thread for several weeks on trout and bass fishing. It holds well on hooks and doesn’t fray easily. The wax finish keeps it from slipping during casting. Stronger than other threads I’ve tried.
Heather Avery –
Great for tying on lures. The 80-yard spool is convenient and the thread stays intact even under tension. No slippage on hooks, which is a big plus.
Gavin Metcalfe –
Solid performance in both still and moving water. A bit more expensive than basic threads, but the durability justifies the cost.
Jake MacLeod –
Felt the difference in strength when using it on larger baits. No breakage during retrieval. The wax makes it more resistant to water exposure.