Cobra Golf Ladies Bio Cell #4/5 Hybrid Ladies FlexAqua Splash New BiO Cells combined with E9 Face technology removes more weight from the face and crown to reposition it low and back to deliver the best combination of a super low CG and high MOI High Strength Steel Face Forged thin, shallow high strength steel face inserts (Driver like construction) enables more face flex for faster ball speeds, longer distance, and higher trajectory