The bubble top makes it a little more stable which is good for my arm because it flies like a more stable wraith.
Ordered an Opto-X Chameleon Flow to pair nicely with a couple of Opto's I currently have in my bag. Works exactly as described, a slightly stiffer and more overstable finish than the standard Opto. Nothing extreme just enough to be more reliable in the wind but still get plenty of glide and distance.
I luv the Opto
Plastic. The Opto X is just a hint more stiff than Opto or even Opto Air.
Great disc. Predicting the same flight each time. And a hard fade at the end.