Kevlar® NoKnot Slow Sink Fly Line
Sink Rate 2 inches per second. Ideal for targeting fish in their feeding zones. Its slow sink rate allows it to maintain a level plane, keeping flies just where fish are actively hunting. Smooth casting and reduced tangles, makes it easier to cover various water types. Red Overhang Marker for 10 out of 10 perfect casts.
- 100' Kevlar® core PVC coated fly line.
- 150' of 0% stretch Kevlar® backing.
- NoKnot backing connection.
- Reinforced welded loop.
Fly Line Shipping Rates
| Country | Cost | Service |
|---|---|---|
| UK | £3.99 | Tracked Next working day delivery |
| Europe | £3.99 | Tracked 3-5 days working day delivery |
| USA | £5.99 | Tracked 7-10 days working day delivery |
| Rest of World | £5.99 | Tracked 7-10 days working day delivery |
Fly Line Warranty
We offer a no none-sense 3 month money back guarantee if anything goes wrong with your line, whether it was your fault or ours.
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A 2-inch-per-second sink rate is ideal for targeting fish in 2–6 feet of water. It maintains a consistent depth, ensuring precise fly placement and effective coverage in stillwaters or slow-moving rivers. Perfect for fishing mid-water feeding zones.
Kevlar® NoKnot Slow Sink Fly Line
A slow sinking fly line is perfect for fishing 2–6 feet deep in stillwaters or rivers. Ideal for nymphs, wet flies, lures, or fast strips, it keeps your presentation in the feeding zone with precision and control.
I use this line with snake flies, deadly. The line gets to depth fast but sinks at the rate that is natural for lures and nymphs, casts a mile too
4 Innovations. 0 Knots.
Sunray fly lines feature 4 innovations which make them the easiest to cast fly lines in the World.
Click on the + symbols to learn
Overhang Marker
Load the Overhang Marker to the rod tip and let go. Perfect casts every time. Made with 3M glass microspheres.
150' Kevlar Backing
Runs seamlessly into the fly line. NoKnots. Made by Dupont USA.
Spey (Triangle Taper)
Spey taper perfect for long overhead casting and all roll casts. Has more directional accuracy and stability in the air than regular tapers. Made with 3M glass microspheres.
Micro thin running line
Reduces friction in the rod guides when cast. Increases distance. Made with 3M glass microspheres.
250' of 0% stretch bullet proof fly line with a reinforced welded loop.
Want to geek out? Here are the factory specifications.
150' Kevlar 0% stretch
100' Kevlar 0% stretch
100' cured liquid plastisol. Zinc sinking compound
250' (backing & fly line)
Triangle (Spey) taper
Sinks at 2 inches per second
No coiling, lands gently, lays straight, silent pick ups, very fast line speed.
#5-#6 (36') • #7-#8 (38')
#5- 17g • #6- 19g • #7- 21g • #8- 23.5g
150' Kevlar backing attached.
with no knots.
No more jammed knots in the rod guides
The best knot is NoKnot
Move the slider to see NoKnot in action
Kevlar Backing
Coated Fly Line
Dave G.
"Seems so obvious now"
The fact it's one continuous Kevlar fly line and backing is just genius.
Warren C.
"Panic over"
I've got a 100% strong smooth connection so when a fish runs I just let it.
Joshua A.
"NoKnot has changed it for me"
I used to worry about the knot jamming in the rod guides. No more.
Henry L.
"No more expensive backing"
Basically it's like getting free gel spun backing, but better.
Don't take our word for it. Ask Dupont USA.
5 times stronger than steel.
Kevlar is used in the most demanding environments in the World. It has zero stretch which means that your casting gets a hit of steroids, the hook sets are instant and pound for pound your fly line is now 5 times stronger than steel. Because our core does not stretch during casting or fishing, our coatings don't crack.
It's not just our core that is bullet proof
Reinforced welded loop
Featuring a Kevlar core, our welded loops are already the strongest on the market. That wasn't enough for us, we went one step further and wrapped our welds in a micro thin film of protective tubing. Supple, strong and slim.
Cores of steel & coatings of glass.
We're not just a pretty face.
Our fly lines contain microscopic particles of 3M glass air microspheres. Every colour is chosen not just for it's optical qualities but also it's flight characteristics. Our R&D into pigment science informs our coating formulas in a way that has set us apart from the industry for the last 15 years.
NASA® approved.
Interesting Fact : When the Mars Pathfinder landed on the surface of Mars, ropes made of Kevlar® helped it to complete its 40-million-mile journey.
Will the Kevlar® NoKnot Slow Sink Fly Line work on my rod?
A Kevlar fly line will enhance any rod by any brand. Whether it's carbon, fibreglass, fast or slow, it will make your rod feel like it's on steroids.
What weight Kevlar® NoKnot Slow Sink Fly Line should I get?
Match the line rating to the rod rating. A Kevlar fly line weighs the same as a regular line. It just flies faster and further.
Is there a special backing to spool Knot I need?
Just use a regular arbour knot, the same knot you would use for tying regular backing to your fly reel.
Will the Kevlar backing get wet or rot?
Kevlar® is very good at repelling water and drying. It is the strongest cord material per diameter in the World. It will not rot.
What if I already have backing on my reel?
Regular backing will not be as strong as Kevlar®. We recommend you unwind your regular backing and load with NoKnot, the strongest backing and a seamless connection to your fly line.
Watch this film from Dupont®
So what is Kevlar® exactly?
Bought the line for a 6 weight rod to fish my local reservoir, the water temps have dropped and the fish are deep. This line helped me select different depths, slow and methodically until I found the fish.
Tom Bell
Meet the designer.
Tom is an advanced fly casting and fishing instructor with AAPGAI. The Advanced Association of Professional Game Angling Instructors certificate is regarded as one of the hardest casting and teaching qualifications in the World.
Sunray Founder, Tom Bell
I use this line to search for fish. I wouldn't go anywhere without it.
Sunray fly lines are the only fly lines with Kevlar® cores. Our Overhang Marker® has helped 80,000 fly fishers Worldwide cast more effectively. We invented 'micro-thin' fly lines in 2014 and our tapers are built on 45 years of fly casting experience.
Fly line shipping rates & delivery
| Country | Cost | Service |
|---|---|---|
| UK | £3.99 | Tracked Next working day delivery |
| Europe | £3.99 | Tracked 3-5 days working day delivery |
| USA | £5.99 | Tracked 7-10 days working day delivery |
| Rest of World | £5.99 | Tracked 7-10 days working day delivery |
What if I need to return a fly line?
Simple, call our customer services or email support@sunrayflyfish.com. We will send you a pre paid returns label and ask you whether you'd like a refund or replacement.
Do your fly lines come with a warranty?
We offer a no none-sense 3 month money back guarantee if anything goes wrong with your line, whether it was your fault or ours.
How do I know you are a good company?
We're not new to this. We formed in 2014 and we are the biggest direct to consumer fly fishing brand in the UK. We ship Worldwide and we get it there quickly.
I needed the fly line for a competition. I ordered on Friday and it was on my door matt Saturday morning, amazing.
I had confidence in the fact the core was made by Dupont and the coating 3M. I wasn't dissapointed. Wow!
I couldn't believe how quick it was delieverd. It felt like I had just placed the order and it was there! All the way from the UK in a matter of days.
Despite Brexit I took a chance ordering from this UK company. Yes, I had to pay taxes but it's the best fly line I have ever bought and it was cheaper than the American brands.