Ester line (polyester monofilament): Water and current
Polyester is denser than water, but sinking behaviour also depends on diameter, current and treatment. Visible colours help track fine line. A clear leader and its connections should match the product and presentation.
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Ester line (polyester monofilament)
A polyester monofilament from Japanese light-game fishing: sinks, stretches only 5-8 %, thin and sensitive as braid, brittle as glass on a shock — the ultralight main line that most North American anglers have never seen.