Scientific Anglers
Scientific Anglers Sonar Sink 25 Cold Fly Line
Scientific Anglers Sonar Sink 25 Cold Fly Line
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DESCRIPTION & FEATURES
DESCRIPTION & FEATURES
SINKING-HEAD FLY LINE FOR COLD WATER
When it comes to fishing streamers in cold water, it’s difficult to beat the SONAR Sink 25. Designed with a short 25′ fast-sinking head, the Sink 25 sinking fly line gets flies deep extremely quickly and is paired with a large diameter handling section for excellent line control. When it’s time to get down and dirty, the Sink 25 has your back.
- 25’ extra-fast sinking head with handling line
- For coldwater applications
- An excellent streamer line
- Low tangle design increases shooting distance
- Floating running line
- Super Fast Sink: 4.0 – 8.0 ips, sinks 4’ – 15’
- Replaces Mastery Wet Tip Express
- Braided multifilament core
- SA ID – SA SONAR SINK 25 ### (### = grain weight)
TAPER DIAGRAM
APPLICATIONS
SPECIFICATIONS
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* Grain weight for the first 25′




At Spawn Fly Fish, we’re proud to carry a handpicked selection of products for anglers of all levels. Explore top brands like Sage, Redington, Douglas LRS, Ross Reels, and more. Whether you’re tying with Shrimp Eyes, crafting with Unreal Dubbing, or looking for Loctite Super Glue Extra Time Control to secure your creations, you’ll find everything you need here.We also stock a wide range of fly tying materials, fly rods, and fly reels—including favorites like Tibor Fly Reels, Lamson Fly Reels, and Redington Fly Reels. For complete guides on where and how to use your new gear, check out our Fly Fishing Guide to Washington or browse our blog or YouTube channel for in-depth product tips and tutorials
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Free shipping on orders over $49 to the contiguous US
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2% PLEDGE
2% of all Spawn profits are donated to conservation groups. This has been true since our 1st day of business