Defender Hybrid

The next line of defense is here! Defender Hybrid features the newly updated formulation of the popular A.C.T. coverstock. This new A.C.T. 3.0 hybrid reactive cover, finished at 500/1000/1500 Siaair and polished with Crown Factory Compound, will help provide more “bite” midlane and a strong continuous hook on medium to heavy lane conditions.

Inside, the Portal X asymmetric core with higher RG/diff will help to create a more responsive breakpoint.
Here’s what Brunswick has to say about Defender Hybrid:

The new Brunswick Defender Hybrid is the first ball introduced using HK22. You’ll first notice the shelf appeal and colors of the Defender Hybrid and how they pop; this is due to the new translucent base material. The new base material HK22 creates a noticeable and exciting advancement in shiny ball hook potential, creating more teeth in the mid-lane for a shiny ball and a stronger, more responsive breakpoint. The ACT 3.0 additive package was added to the HK22 base to achieve optimal ball reaction. The overall result is more backend and a shiny ball that will handle more volume and give the bowler more area at the breakpoint.