Sonar Sink 25 Cold

Experience powerful deep-water performance with the Scientific Anglers SONAR Sink 25 Cold Fly Line, a specialized sink-tip fly line built for streamer fishing in cold and moderate water conditions. Featuring Scientific Anglers’ Advanced Shooting Technology (AST), the Sink 25 Cold delivers excellent slickness, shooting performance, and durability when reaching fish holding deep is essential.

The 25-foot extra-fast sinking head is paired with a floating handling and running line, allowing the fly to reach depth while maintaining excellent control during casting and retrieves. Its low-tangle design helps increase shooting distance, making it an excellent option for covering water and delivering streamers efficiently.

Built around a braided multifilament core, the SONAR Sink 25 Cold is available in multiple grain weights to match a wide range of rods and fishing situations.

Key Features

• Premium cold-water sink-tip fly line
• 25-foot extra-fast sinking head
• Floating handling and running line
• Advanced Shooting Technology (AST)
• Excellent slickness and durability
• Low-tangle design for increased shooting distance
• Designed specifically for streamer fishing
• Braided multifilament core
• Available in multiple grain weights
• Designed for cold and moderate water
• Excellent depth control for subsurface presentations
• Ideal for trout, steelhead, salmon, bass, carp, stripers, and Esox
• Made in the USA

Specifications

• Brand: Scientific Anglers
• Series: SONAR
• Model: Sink 25 Cold
• Line Type: Sink Tip Fly Line
• Technology: Advanced Shooting Technology (AST)
• Head Length: 25 ft / 7.6 m
• Total Length: 105 ft / 32 m
• Available Grain Weights: 150–350 grains
• Rod Weight Range: 5–10 wt
• Sink Options: Sink 3 / Sink 6
• Sink 3 Rate: 2.5–3.5 IPS
• Sink 6 Rate: 5.5–6.5 IPS
• Core: Braided Multifilament
• Primary Fly Type: Streamers
• Water Temperature: Cold / Moderate
• Primary Species: Trout, Steelhead, Salmon, Bass, Carp, Esox & Stripers
• Country of Origin: USA

Perfect For

Ideal for anglers looking for a fast-sinking streamer line with excellent casting control and depth management. The SONAR Sink 25 Cold is especially well suited for anglers who want an extra-fast sinking head, a manageable floating running line, long shooting distance, and dependable performance when targeting fish below the surface.