Golf club head

A golf club, comprising:

• a golf club shaft comprising a butt end and a tip end;
• a golf club head comprising a body, defining an interior cavity of the golf club head, and further comprising a sole defining a bottom portion of the golf club head, a crown defining a top portion of the golf club head, a skirt portion defining a periphery of the golf club head between the sole and the crown, a face defining a forward portion of the golf club head, and a hosel defining a hosel bore, wherein the body further comprises a shaft attachment port positioned in the sole and extending into the interior cavity, the shaft attachment port having a port width, the shaft attachment port being located proximate a bottom end of the hosel such that a passage in the bottom end of the hosel provides communication between the hosel bore and the shaft attachment port;
• a sleeve mounted on the tip end of the golf club shaft and adapted to be inserted into the hosel bore;
• and
• a fastener having a head portion and a shaft portion, wherein the shaft portion of the fastener extends through the passage, the fastener being selectively attachable to the sleeve when the sleeve is inserted into the hosel bore,
• wherein:
• the golf club head further comprises a large weight, attached to the body, wherein the body is made of at least a first material having a first material density of no more than 8 g/cc, the large weight is made of a second material having a second material density of no less than 7 g/cc, and the first material density is less than the second material density;
• a ratio of the second material density to the first material density is at least 1.70, inclusive;
• at least 60%, inclusive, of a total mass of the large weight is forward of a theoretical forward-rearward midplane of the golf club head that extends parallel to an x-axis of a golf club head origin coordinate system of the golf club head at a midpoint between a forwardmost point of the golf club head and a rearwardmost point of the golf club head;
• the body comprises a weight mating recess, configured to receive at least a portion of the large weight;
• the large weight has a thickness that varies;
• the large weight has a volume of at least 3 cubic centimeters, inclusive;
• the large weight defines a portion of a sole of the golf club head;
• and
• the large weight defines at least 6 square centimeters of a surface area of the sole.

A golf club head, comprising:

• a body, comprising a face portion and defining an interior cavity and a hosel defining a hosel bore;
• and
• a large weight, attached to the body, wherein the body is made of at least a first material having a first material density of no more than 8 g/cc, the large weight is made of a second material having a second material density of no less than 7 g/cc, and the first material density is less than the second material density;
• wherein:
• a ratio of the second material density to the first material density is at least 1.70, inclusive;
• at least 60%, inclusive, of a total mass of the large weight is forward of a theoretical forward-rearward midplane of the golf club head that extends parallel to an x-axis of a golf club head origin coordinate system of the golf club head at a midpoint between a forwardmost point of the golf club head and a rearwardmost point of the golf club head;
• the body comprises a weight mating recess, configured to receive at least a portion of the large weight;
• the large weight has a volume of at least 3 cubic centimeters, inclusive;
• the large weight defines a portion of a sole of the golf club head;
• and
• the large weight defines at least 6 square centimeters of a surface area of the sole.

A golf club head, comprising:

• a crown portion, positioned at a top region of the golf club head, a sole portion, positioned at a bottom region of the golf club head, a skirt portion, positioned around a periphery of the golf club head between the sole portion and the crown portion, and a face portion, positioned at a forward region of the golf club head, opposite a rearward region of the golf club head, and extending from a toe region to a heel region of the golf club head and defining an interior cavity and a hosel defining a hosel bore,
• wherein:
• the golf club head is made of at least a first material having a first material density of no more than 8 g/cc, and made of a second material having a second material density of no less than 7 g/cc, and the first material density is less than the second material density;
• the crown portion and the face portion are at least partially made of a third material, different than the first and second materials;
• the third material is a fiber-reinforced polymer having a density between 1 gram/cc (g/cc) and 2 g/cc, inclusive;
• and
• a mass of the golf club head made of the second material is at least 40% of the mass of the golf club head made of the first material.