The Prism Ion was introduced by Prism in the early 90s, and is rated for 3-20 mph winds. This one is numbered #6458
This is in stunning condition with no visible signs of flight (the nose and leading edge are clean). But the sail looks like it's been folded enough times that the factory folds aren't visible, so it's obviously been flown at some point.
Includes a sleeve but no line.