What is monofilament line

Monofilament is easy to underrate: it is cheap, familiar and sits in every tackle box. Yet of all the line types it is the only one that deteriorates on its own — without fishing, without snags, simply with time. That is where planning a season should start.

What it is made of

Mono is a single solid strand of plastic, not a bundle of several as braid is. The commonest material is nylon, for a simple reason: it is cheap to produce. Hence the price that keeps mono the default choice.

It is made in a range of colours — clear, white, green, blue, red and fluorescent.

The main point: it ages

Mono weakens over time, and fastest of all with heat, sunlight and salt water. This is not wear from use but a change in the material itself.

There is one practical conclusion, and it is inconvenient: a reel that spent a season on a windowsill or in a car boot no longer holds what the packet claims. Before the first trip, test old line to destruction by hand rather than trusting the figure on the label.

Memory

A second property of the same origin: after a long spell on the spool, mono comes off it in coils. That is what anglers call memory.

The coils spoil the cast and hide bites: instead of a straight line to the lure you get a spring that eats part of the movement. Braid does not do this — it has no memory at all.

It absorbs water

One more trait people do not expect: mono absorbs water, and knots in it weaken as a result. That is precisely why it is not recommended for deep-water fishing.

On ordinary inshore fishing this matters less, but the rule stands: retie a knot in mono after a long day in the water rather than saving it for next time.

Stretch works for you

Here mono wins. It extends under load, and that stretch absorbs the force of the strike and of playing a fish.

In other words, what braided line lacks is built into mono. It takes the sharp lunge at the bank on itself, and the hook tears out less often. The price is sensitivity: mono passes a touch at range less well.

It floats

Nylon mono stays on the surface, unlike fluorocarbon, which sinks. For float fishing that is an advantage: the line lies on the surface and does not drag the rig down.

For fishing on the bottom it is the opposite — surplus drag. So the choice between them starts not with price but with where the bait has to be. More on the tackle in float rods.

What we do not write here

Precise numbers circulate about mono: what percentage it stretches, how many months it lasts, how visible it is. We found no verified source for those figures and do not give them.

What is above is the behaviour of the material, not one season of somebody’s experience.