Golf club heads with energy storage characteristics

A golf club head comprising:

• a hollow body formed between a sole and a crown;
• a front end comprising a strikeface extending between the sole and the crown and being operative to impact a golf ball;
• a rear end;
• a heel region;
• a toe region opposite the heel region;
• and
• wherein a ground reference plane is defined such that the ground reference plane is tangential to and in contact with at least a portion of the sole, and a front reference plane is defined such that the front reference plane is perpendicular to the ground reference plane and both tangential to and in contact with a forward most point of the strikeface;
• and
• wherein a reference loft plane is defined such that the loft plane is tangential to and in contact with a geometric center of the strikeface;
• wherein the sole defines a cavity on an outer surface of the sole and behind the strikeface, the cavity comprising;
• a front edge coincident with an outer profile of the sole;
• a side wall extending into the cavity from the front edge;
• a rear edge coincident with the outer profile of the sole;
• an inner wall extending into the cavity from the rear edge;
• a cavity length measured in a toe to heel direction;
• an apex axis;
• a front surface extending for the front edge to the apex axis;
• a main portion and;
• an inset portion;
• wherein:
• at least a portion of the front surface extends towards the strikeface in multiple directions, such that at least a portion of the front surface extends toward the strikeface.