RIO Flouroflex Plus is the strongest, thinnest flourocarbon on the market with an incredible strength; for example, 5lb for 5x material.

It is a slightly softer material than Flouroflex and ties excellent knots. Specifications are printed on the elastic restraint for easy identification.

The refractive index (1.42) of Flouroflex in water (1.33) compared to nylon (1.62) makes it almost invisible to fish. Flouroflex Plus, with a density of 1.72 (compared to nylon of 1.15), sinks quicker and gets below the surface tension for more effective dry fly, nymph and wet fly fishing.