The Mainstream Float fly line is designed as Rio's all round, all purpose fly line. While Many RIO products focus on the technical challenges of specific fishing situations, Mainstream lines are targeted to the overall needs of most fly fishers looking for a cost efficient, one line solution.

The Rio Mainstream features slightly shorter heads and tapers to ensure performance under almost any conditions and feature a supple, self-lubricating coating that remains memory free in cold water. Rio Mainstream floating fly lines are available in a range of AFTM ratings.