I am guilty of using a little of whatever I have around, but a friend gave me an old "leader making kit" from Stren. There were small spools of line from 30# to 2# in it, all fit in a nice plastic tube. I don't think it was your typical spinning line Stren however, it had a little more stiffness to it. Makes good leaders too. I have alway saved line that was not really good for spinning rods or even casting rods to make leader. But I am a long ways from being expert in this area.