Billdozer is correct. When 900 Global had their high performance balls poured in Utah, we didn't use SXX on these balls. We used a number then had alert, response and dig behind them. Basically it was the storm additive in the cover. Now, 900 Global's plant can do it all. So basically all of our covers will use the same product as Storm uses. Cover additives will be different, but urethane base will come from the same place. Hope this helps.