Sufix Zippy Shock Leader is a step above traditional nylon mono leaders. It is made with a copolymer nylon that absorbs the initial 'shock' from casting heavy leads.Designed and developed to give the biggest of casters total confidence, Zippy is the number one choice for anglers wanting to fish at maximum range, without the fear of the line cracking off during the cast.Sufix Zippy Shock Leader offers superior strength to diameter ratio, yet it is easy to handle.