Since you guys manufacture Lane #1's bowling ball, perhaps newguy or Eric can clarify something for all of us. What is the cover on the GemStone?

Lane #1's website says this:

With it's high proformance Hybrid ISO pearl coverstock.

And this:

Cover Stock: Hybrid ISOTM Solid Reactive

So.......what the heck is the cover?

Thanks for any insight that you may be able to provide.