Developed specially for anglers concerned with distance casting and overcoming wind, the 444SL is a Specialized Line produced from a unique formula that provides a greater degree of stiffness than other lines on the market. This feature reduces friction caused by line sag between the guides, thus increasing the efficiency and distance of your cast. The special taper designs are customized to the line weight to give you tighter loops and better line control. Extremely high floating and durable. It is important to install MICRON Fly Line Backing on your fly reel before your 444 fly line. Installing MICRON reduces tight curling of your fly line by increasing the diameter of the arbor of your reel. Item# 1766