That line has the strength to launch a streamer, keeping the delicacy for dry flies. It is corrected (mending) like a dream and allows to launch at different distances. It has a long head and an important front taper, it is perfect for fishing different  species, from pejereyes, carp to large trout. The reason why they called it infinity is because it has no end in the possibilities it gives you.
 Extremely versatile taper, designed for most freshwater species.
 Made for loading fast action rods, but works well with a wide variety of rod actions
 Extended head length for longer throwing and improved mending ability
 Excellent for dry flies, nymphs and streamers
 For use in moderate to cold climates
 Braided multifilament core
 SA MS INFNTY WF XF  (X = line weight)