This line must not be mistaken with Krystonite which is a co-polymers coated with fluorocarbon. Clearwater Xtra is a high abrasion resistant pure fluorocarbon main line with nil memory. Unlike any fluorocarbon yet produced Clearwater Xtra flies through the rings and resists line twist. During field tests it has out-performed all main lines and produced far more takes due to its invisibility. It is not cheap but the best never is. Spools are marked at 200 metres so you know how much you have wound on. You will not believe the results when you use it!