BooYah is Urethane. It isn't pure Urethane for the simple fact they can't make that anymore. Black Ops has the S70 cover and Break core. Then the Chemical X will have an S55 Solid Cover and a symmetric core with a 2.49rg and .035 diff. I believe the numbers are correct. Definitely going to fit our arsenal perfectly. Along with the Dream Big and Respect Pearl, these summer releases are going to be unreal!!!