Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion with an interior cavity and a face portion attached to the body portion to enclose the interior cavity. The golf club head also includes a filler material in the interior cavity and attached to the back surface of the face portion. The golf club head also includes an internal mass portion in the interior cavity spaced apart from the body portion and attached to the filler material. The filler material may be located between the face portion and the internal mass portion. The internal mass portion may be movable in the interior cavity relative to the body portion and the face portion. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads, golf clubs, and methods to manufacture golf club heads and golf clubs are generally described herein. In one example, a golf club head includes a body portion with an interior cavity and a face portion attached to the body portion to enclose the interior cavity. The golf club head also includes a filler material in the interior cavity and attached to the back surface of the face portion. The golf club head also includes an internal mass portion in the interior cavity spaced apart from the body portion and attached to the filler material. The filler material may be located between the face portion and the internal mass portion. The internal mass portion may be movable in the interior cavity relative to the body portion and the face portion. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head includes a body portion having a front portion, a rear portion, a toe portion, a heel portion, a bottom portion, an interior cavity, and a top portion having an opening to the interior cavity. The golf club head also includes a crown portion attached to the top portion and covering the opening in the top portion and enclosing the interior cavity. The crown portion may include an inner composite layer defining an inner surface of the crown portion, an outer composite layer defining an outer surface of the crown portion, and an inner crown portion layer attached to the inner surface. The inner crown portion layer is configured to dampen vibration of the golf club head. Other examples and embodiments may be described and claimed.

Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head includes a body portion having a front portion, a rear portion, a toe portion, a heel portion, a bottom portion, an interior cavity, and a top portion having an opening to the interior cavity. The golf club head also includes a crown portion attached to the top portion and covering the opening in the top portion and enclosing the interior cavity. The crown portion may include an inner composite layer defining an inner surface of the crown portion, an outer composite layer defining an outer surface of the crown portion, and an inner crown portion layer attached to the inner surface. The inner crown portion layer is configured to dampen vibration of the golf club head. Other examples and embodiments may be described and claimed.

Embodiments of golf clubs with adjustable loft, lie, head mass and methods of manufacturing golf clubs with adjustable loft, lie, and head mass are generally described herein. Other embodiments can be described and claimed.

A golf club head has a face portion, a crown portion, and a sole portion. The golf club head includes a weight member that is configured to be wound, a first wound portion around which a first part of the weight member is to be wound, and a second wound portion that is disposed apart from the first wound portion and around which a second part of the weight member is to be wound. In the golf club head, a position of a center of gravity of the golf club head is adjusted by changing a weight ratio of the first part to the second part. At least either the first wound portion or the second wound portion may be rotatable in a reel-in direction and a reel-out direction.

Embodiments of golf club heads with energy storage characteristics are presented herein. In some embodiments, a golf club head comprises a hollow body comprising a strikeface, a heel region, a toe region opposite the heel region, a sole, a top rail and an inflection point. The inflection point provides increase bending of the strikeface thereby providing performance enhancement over clubs without an inflection point.

Described herein are embodiments of golf club heads having a balance of the following parameters: a low and back club head center of gravity position, a high moment of inertia, a large Ixy product of inertia, and low aerodynamic drag. Methods of manufacturing the embodiments of golf club heads having a balance of club head center of gravity position, moment of inertia, product of inertia, and aerodynamic drag are also described herein.

Described herein are embodiments of golf club heads having a balance of the following parameters: a low and back club head center of gravity position, a high moment of inertia, a large Ixy product of inertia, and low aerodynamic drag. Methods of manufacturing the embodiments of golf club heads having a balance of club head center of gravity position, moment of inertia, product of inertia, and aerodynamic drag are also described herein.

Disclosed herein is an iron-type golf club head that comprises a body, made of a first material having a first density. The iron-type golf club head also comprises a weight located within the internal cavity. The iron-type golf club head further comprises a filler material that has a density no less than 0.21 g/cc. The filler material has a mass no less than 2.5 grams and no more than 8 grams. The internal cavity has an internal cavity volume ranging between 5 cc to 20 cc. A ratio of the internal cavity volume to external club head volume ranges between 0.14 and 0.385. The internal cavity has a minimum front-to-back depth above a midplane of the golf club head of no less than 1.4 mm and a maximum front-to-back depth of the internal cavity above the midplane of the golf club head is no more than 13 mm.