Question: what is the difference between copolymer and monofilament fishing line?
Answer: How It's Made. Just like monofilament fishing line, copolymer line is made by taking nylon and stretching it out to form one ling. However, the difference is that with monofilament fishing line, the nylon used is just of one type, whereas with copolymer lines, there are two different kinds of nylon used.