Golf club head having supported striking face

An iron type golf club comprising:

• a golf club head, a grip and a shaft therebetween, wherein the head comprises:
• a striking face portion located at a frontal portion of the golf club head and an aft body portion attached to the striking face portion forming a cavity therebetween, a topline portion, a sole portion, a toe portion, a heel portion and a hosel, the striking face portion having a face center and a thickness of between 0.8 mm and 2.4 mm at the face center;
• an internal support layer coupled to the aft body portion such that it is located in the cavity and has a forward-facing front surface;
• and
• an intermediary sandwiched layer juxtaposed between the striking face portion and the internal support layer, the intermediary sandwiched layer having a thickness of 1 mm and 10 mm at the face center, the intermediary sandwiched layer having an intermediary sandwiched layer back surface and front surface, said intermediary sandwiched layer being comprised of a polymeric material having a sandwiched face layer tensile strength of between 4 MPa and 20 MPa;
• and
• wherein the internal support layer comprises a thermoplastic material having a support layer tensile strength of between 60 MPa and 300 MPa and wherein the internal support layer comprises a perimeter support portion circumscribing the cavity and having a perimeter width of between 2 mm and 20 mm and a thickness of between 0.5 mm and 5 mm and a horizontal support section extending from a heel section of the perimeter support portion to a toe section of the perimeter support portion and has a horizontal support width between 5 mm and 10 mm.