Forged Composite Crown Callaway has been working with Forged Composite™ -- an advanced carbon fibre material -- for more than four years. Using this patented, lightweight material in the crown of the driver, which weighs only 12.1 grams and is the lightest crown in golf, allows Callaway engineers to precisely position saved weight to achieve the lowest CG in any fully adjustable driver. This Lower CG promotes higher ball speed and less spin off the tee for more distance.