* Grain weight for the first 30′







The Scientific Anglers Sonar Stillwater Seamless Density Fly Line is built for serious stillwater anglers who need precise depth control, direct contact with their flies, and dependable performance throughout the water column. Designed specifically for lake and reservoir fishing, this double-density sinking fly line uses Seamless Density technology to create a smooth transition between sink rates, reducing hinging and maintaining a straighter connection from the angler to the fly for improved strike detection and control.
Overweighted by two line sizes, the Sonar Stillwater Seamless Density loads rods efficiently while helping turn over multiple-fly rigs and long leaders. AST Plus slickness technology enhances shooting performance and durability, while textured hang markers positioned 10 and 20 feet from the tip provide a tactile reference when retrieving flies close to the boat or preparing for the hang.
Choose from multiple density combinations to effectively target trout at different depths. Sink 1/Sink 3 gets flies below surface chop while working the upper water column, Sink 3/Sink 5 is ideal for searching mid-depth zones, and Sink 5/Sink 7 provides the fastest sinking option for reaching deep fish and working flies near the bottom.
Key Features:
| SINK 1/SINK 3 | SINK 3/SINK 5 | SINK 5/SINK 7 | LINE WEIGHT | HEAD LENGTH | TOTAL LENGTH | HEAD WEIGHT | GRAIN WEIGHT* |
| 149228 | 149266 | 149303 | WF-5-S | 45.0' | 100.0' | 280gr | 185gr |
| 149235 | 149273 | 149310 | WF-6-S | 45.0' | 100.0' | 320gr | 210gr |
| 149242 | 149280 | 149327 | WF-7-S | 45.0' | 100.0' | 365gr | 240gr |
| 149259 | 149297 | 149334 | WF-8-S | 45.0' | 100.0' | 425gr | 280gr |
* Grain weight for the first 30′