Enhanced Speed and Distance with Nano-Bi Core Volvik's Soft Layer for Improved Feel and Spin Z-III Cover for Great Spin and Durability Volvik's 12-20 Dimple Design for Excellent Flight 322 Dimple Configuration 90 Compression Level Repulsive Nano-Bi core Generates Great Distance. Volvik Soft Layer Improves Soft Feel and Spin Control. Z-III Cover Provides Great Spin and Excellent Durability. Volvik 12-20 Structured Dimple Gives Excellent Ball Flight. 322 Dimple Pattern. 90 Compression