Callaway X fairways (2008). New for 2008 and using feedback from some of the best players in the world Callaway Golf has re-energized the best-selling fairways woods in the game. The X Fairway Woods are designed to deliver for golfers every time they hit the course. The most significant upgrade is the addition of the highly successful Modified X-Sole Design featured in X Hybrids. This design lowers the leading edge and provides clean turf interaction from the rough or the fairway. The clubs also feature a slightly larger head size for better stability and slightly deeper face for a larger effective hitting area and higher confidence at address.