Rio is a relative newcomer to the fly line game. They made their first fly line in 1997. Since then, they've become a market leader due to great products and clever marketing. Rio divides its lines into 4 "series", which are differentiated by technology and price points: Mainstream, Avid, "Premier", & InTouch. Mainstream & Avid are Rio's entry-level lines and they have aggressive front tapers, while the Premier and InTouch series feature a wider array of lines to fit the needs of any angler. Read on to learn more.