Natural fiber line is made from the organic material of plant fiber. Manila, sisal, hemp and cotton are the most common materials used to form natural fiber line. Manila, made from the fibers of the abaca plant is the strongest and most expensive of the natural fibers, and it is the most widely used.
Pros of natural line: Strong (but not as strong as synthetic), resistant to harmful sunlight UV rays and weathering, and it is resistant to abrasive surfaces.
Cons of natural line: Poor performance in load bearing applications such as towing, it is not resistant to rot, mildew and deterioration, and it has poor resistance to chemicals compared to some synthetic ropes such as polypropylene and polyethylene.

