This is a quote from another thread, in which I was basing my information off of -
"Mono means one or singular. Filament can be a strand or wire. Therefore monofilament means single or one strand. In terms of fishing line this means that the line is composed of a single monomer.
Co-polymer. Co indicates or means two. Sometimes the joining of two things. For example co-worker - two workers working together. Co - uple - like a married couple. Or Co-operation.
Polymer is the term to describe the joining of two or more monomers. If you remember from your algebra class, poly means many, as in polynomial or even polygamy (many wives).
Therefore, you can gather from the term co-polymer that it is or should be the joining of two or more monomers. In the case of a typical copolymer line, you might see a monofilament, usually nylon, coated with say fluorocarbon. The joining of these two items is what allows it to be classified as a co-polymer.
Now if you made a line from a single element that is not nylon, it could still be called a monofilament. It just wouldn't be made of nylon.
If you for example combined three different types of nylon, that too could be called a copolymer because two or more elements were combined. Heck, you could even call it a tri-filament (tri, meaning three)."
If I was wrong...my apologies...but my point was that it was 2 types of material combined...I was under the impression it was floro coated. Regardless, its thicker and stronger than your 8 lb test mono that most people think of when they see the term "8 lb"...that is all
