Premier Rio Perception Fly Line -Easy casting, all-around trout line, with ultra- slick performance. The RIO Perception is an easy casting, general purpose fly line that casts nymphs, dry flies, streamers and soft hackles with ease. The short head makes this a particularly good line on smaller rivers and lakes when long distance line control is not necessary. The line features MaxFloat Tip Technology, RIO's proprietary tip coating formula that floats more than twice as high as regular line tips, without any increase in diameter. In addition, this line is built with SlickCast, RIO's proprietary coating technology, creating the slickest, most durable fly lines on the market. Lab tests show that lines built with SlickCast have the least amount of friction ever measured in a fly line.