It is a strange hybrid almost like braid with a teflon coating. I loved everything about it sensitive,cast like butter, and any bird nest a cinch to untangle. Unfortunately did not pass the most important test, durability. It frays easily after little use. Back to brAid. Braid never failed me. Should have never changed. Make sure I check reviews before trying something new. Not only did I lose what may have been trophy smallie, I'm out $17.