The stretch allows the line to soak up head shaking, which reduces the risk of unhooking and breakage. This feature is "forgiving": Ideal for novice anglers. Allows you to fish with peace of mind and master big, hard-fighting fish. A strong nylon will allow you to use smaller diameters for finer fishing. Abrasion-resistant nylon lines (that can withstand rubbing and sharp edges) are good for fishing in cluttered waters (rocks, grass, branches etc). What's more, these smooth lines guarantee better casting performance. Fluorescent lines allow you to follow your line in all conditions (with or without current).