●Precision-engineered balance of strength and elongation
Fundamentally, if a line is designed solely for tensile strength, it loses its shock-absorbing capability, compromising overall strength.
Conversely, a thread that absorbs too much shock and stretches excessively also lacks strength.
Tough-Flexx achieves an optimal balance of strength and stretch, making it resistant to breaking unless subjected to significant time and energy.
The result is “durability” that fully unleashes the material's potential.
We spared no expense in incorporating our line-making expertise to boost the catch rate for big-game targets by even 1%.

●Unparalleled knot stability
We pursued the ultimate in “flexibility” to achieve unprecedented ease of knot tying.
You'll notice significantly reduced difficulty tying knots, especially with thicker lines.
When knotting with braided line, you can feel the leader tighten with each wrap.
This softness delivers stable knots that maximize the line's inherent strength.

●Coloring that conceals the line's presence
Dark-toned colors have been proven to suppress light scattering.
We named this color, which eliminates the line's visibility to the target, “Phantom Gray.”
The tougher the conditions, the more this color difference will be the key to turning the tide.

●Newly Adopted ''Parallel Spooling'' & ''Spool Band''
We've perfected a spooling technology that achieves beautiful parallel spooling even with thick lines up to size 100.
Additionally, we've newly adopted a wide spool band that allows smooth line feeding.
Each line is finished with meticulous care, embodying the pride only Sunline can deliver.