River is one of Latitude 64 most popular discs. And this thing has GLIDE. It is easy to throw and fits most player’s power and skill levels.
About the Opto X plastic:
Opto is made out of some of the world’s most durable plastics. It comes in a variety of beautiful translucent colors. The Opto Line plastic has been developed to withstand severe punishment and extreme conditions better than other plastics. Opto-X is a slightly stiffer plastic that results in more overstable flights.