That would be a string that I would be **very** interested in!This confidential 2.0 string looks more pentagonal but it could be square ?? not sure. but all I do know is that it grabs the ball like crazy even more than hyperG or tourbite.
And my original reason for saying Hyper-G rather than Tour Bite string shape is because I found Tour bite to get round on me as it wore, whereas I thought Hyper-G retained its square shape and 90 degree edges better, maybe because as the edge wears down, the flat surface contacting the ball also wears down and kind of re-sharpens that edge.
Hyper-G notched more for me than Tour Bite and did not last as long, but I preferred the slightly higher power level and better spin capability even though I had to restring more often.