I suspect, they may be using one of the newer classes of Fiberglass. When I
was talking with Gary Loomis (and I have the whole conversation on tape), he
indicated that some of Today's high tech glasses were in fact more
sensitive, stronger, and lighter than most graphites. But the word Glass
would kill the value of these rods because so much marketing went into the
promotion of graphite and how it was better than glass.

Personally, I think it would be killer to have the sensitivity and stiffness
of graphite and the durability and strength of a glass. But I can
understand their reasoning. Imagine the reaction from the GP and the
industry that just spent 10 years convincing everybody that graphite is
superior, now spins around and says, "Wait, the new high tech glass rods are
better than graphite." Most would think that it is just a ploy to sell more
rods.

--
Craig Baugher