Much debate on running lines. We carry every running line possible, but I think only a few are worthy of your consideration.
There are 3 basic types of running lines:
Nylon Mono (flat and round) - Shoots well and requires less power in casting. It can be tangle-prone. Whatever you do, untangle it while its loose and don't tighten the tangle or tangles will become more frequent. It can be hard to hang on to in cold conditions or if you have bad dexterity.
Fly Lines Style -It's thicker and tends to be less tangly. The weight and thickness of this style running line will cut down on your distance, but much easier to hang on to in cold conditions.
Braided- To be honest, my experiences with braided are minimal and underwhelming