Patent ID: 8870682

Claim:
A golf club head, comprising: a first body portion formed of a first material having a first density and including: at least a part of a sole of the club head and forming a first part of a lower sole surface, a face portion defining a peripheral opening, and a hosel of the club head; a face insert coupled to the peripheral opening of the first body portion and providing at least a portion of a face of the club head; a second body portion formed of a second material with a second density lower than the first density, the second body portion having an upper part coupled to a rear surface of the first body portion opposite the face and a lower part extending backwards from the upper part and into the sole and forming a second part of the lower sole surface; and a third body portion coupled to at least one of the first and second body portions and formed of a third material having a third density greater than the first density, wherein if I zz is a moment of inertia about a the vertical axis and CG z is a height in mm of a center of gravity of the club head when the club head is at address, then CG z * 170≦I zz >about 2800 g·cm 2 ; wherein the vertical center of gravity of the club head is greater than about 17 mm.