Scientific Anglers Sonar Stillwater SD S3/S5 sinking fly line is specifically designed to meet the needs of stillwater anglers. The line features a seamless density construction, allowing for a smooth transition between different sink rates and providing a direct connection to the fly.
The line is based on the popular MPX taper and is overweighted by two line weights, making it easier to handle multiple flies and long leaders. The line includes 10 and 20-foot textured markings to aid in fishing. The seamless density technology eliminates line hinging and improves control.
Scientific Anglers Sonar Stillwater SD S3/S5 - Features:
- Designed for the needs of stillwater anglers
- Based on the popular MPX taper
- Overweighted by two line weights for handling multiple flies and long leaders
- 10 and 20-foot textured markings
- Seamless density technology with smooth transitions
- Intermediate/Sink 3: Sink rate of 1.25 ips on the running line and 3.0 ips on the head
- Sink 3/Sink 5: Sink rate of 3.0 ips on the running line and 5.0 ips on the head
- Sink 5/Sink 7: Sink rate of 5.0 ips on the running line and 7.0 ips on the head
Cleaning the line with soap and water removes most dirt, but cleaning pads work even better. A clean line casts better and lasts longer. Clean the line every 2-3 fishing trips or whenever dirt hinders its performance.
Product text updated on 18.12.2025.