Scientific Anglers Sonar Stillwater Series Seamless Density Line

The Seamless Density family of fly lines are "a unique departure from the traditional graduated density lines of years past". Seamless Density Technology gives the angler a smooth transition between densities, eliminating hinging, and providing a straight-line connection to the fly. These lines also feature the gambit of SA's proprietary technology including texturing, Advanced Shooting Technology, Line ID, Sonar Sinking Technology, welded loops and more. With these three lines you're well equipped to meet most lake fishing scenarios.   

Intermediate/Sink 3: Designed to get under the surface chop, with an intermediate (1.25 ips) running line and Sink 3 head (3.0 ips)

A.K.A.: Type 3

Color: pale green/dark green

Sink 3/Sink 5: For searching the middle of the water column, with a Sink 3 running line and a Sink 5 head (5.0 ips)

A.K.A.: Type 5

Color: Dark Green Charcoal

Sink 5/Sink 7: The fastest sinking SD line, with a Sink 5 running line and Sink 7 (7.0 ips) head, designed to dredge the bottom

A.K.A.: Type 7

Color: Charcoal/Black

• Based on the MPX taper, Over-weighted by two line weights for multiple flies and long leaders
• Features 10-foot and 20-foot textured hang markers
• Shooting Texturing 
• Advanced Shooting Technology (AST)
• SA Line ID
• Sonar Sinking Technology
• Seamless Density 
• Welded Loops

for more on SA's proprietary Technology, look here: https://www.scientificanglers.com/technologies/