ZnO Flex Core. An ultra-low 35 compression Hi-Spring core gives you a softer feel while maximizing energy transfer and rebound at impact, resulting in dominant distance for the average swing speed player. Extended Flight Dimple Pattern. A shallower U-shaped dimple promotes decreased drag and increased lift, so the ball stays in the air for longer even at lower spin rates. Ionomer Cover. A soft ionomer cover increases green-side feel, but also achieves improved scuff resistance, shear resistance, and overall durability.