Golf club head with improved inertia performance

A golf club comprised of a golf club head, a shaft having a shaft axis coupled to the golf club head at a first end of the shaft and a grip coupled to the shaft at a second end of the shaft, wherein the golf club head comprises:

• a frontal portion comprised of metal and comprising a striking face having a face center located at a forward portion of said golf club head, a crown return extending from a striking face top portion and a sole return extending from a striking face bottom portion;
• a non-metallic rear portion located aft of said striking face comprising a crown at an upper portion of said golf club that is coupled to the crown return and a sole on a bottom portion of said golf club that is coupled to the sole return;
• and
• wherein an x-axis is defined as a horizontal axis tangent to said face center with a positive x direction towards a heel of said golf club head, a y-axis is a vertical axis orthogonal to said x-axis with a positive y direction towards said crown of said golf club head, and a z-axis being orthogonal to both said x-axis and said y-axis with a positive z direction extending forward,
• at least a first weighting member located near a central portion of said golf club head in a heel-to-toe orientation, substantially in line with a vertical plane containing the z-axis with said face center and a second weighting member located near the central portion of said golf club head in the heel-to-toe orientation, substantially in line with the vertical plane containing the z-axis with said face center;
• wherein said golf club head has a moment of inertia about said y-axis (MOI-Y) passing through a center of gravity (CG) of said golf club head, said golf club head has a moment of inertia about said z-axis (MOI-Z) passing through said CG, and said golf club head has a moment of inertia about said x-axis (MOI-X) passing through said CG;
• wherein said golf club head has a MOI-Y to MOI-Z ratio of greater than about 1.5;
• and
• wherein the first weighting member is secured to the sole and comprises an internal weight member, an external weight member and a fastener that couples to the internal weight member and secures the internal weight member to the external weight member and compresses the sole between the internal weight member and the external weight member.