The Le Virus
Christian Derefat was one of the first designers who designed modern trick kite and put every of his plans up for free at his homepages.
The Le Virus is his most popular design, a real freestyler. As far as I know this sail was made by Christian himself , with the heavier mylar in the middle.
And when it gets to the Le Virus .. there is just one motto: Just slam it! It is frickin fun!
Wingspan: 226 cm, Height: 86 cm, Keel length: 76 cm, Weight: 281 gr.