Scientific Anglers Sonar Leader 10'

Scientific Anglers Sonar Leader 10' polyleader is designed to help your fly reach the correct depth in the water. This leader is attached to the end of your fly line and allows you to position your fly in any water layer.

Sonar Leader leaders feature welded loops at the back end and a micro swivel at the front end, reducing line twist. They are available in five different densities, allowing you to cover the range between surface and depth. They are suitable for both single-handed and light double-handed lines.

Scientific Anglers Sonar Leader 10' - Features:

• Floating and sinking leaders for single-handed and double-handed lines
• Welded loop at the butt end of the leader and micro swivel at the tip end (floating model does not have a swivel)
• Made from 25 lb monofilament
• Equipped with markings to help identify weight and length

Sonar Leader leaders are an excellent choice when you want to control the depth of your fly and enhance your fishing experience.

Product text updated 18.12.2025.