The Project X LZ, or "Loading Zone" shafts feature a linear soft zone in the middle of the shaft which is visibly reinforced with bias wraps to maintain torsional stability. The “loading zone” is specifically positioned by flex to maximize ball speed and spin properties. Project X engineers created a unique recipe of a very flexible mid section-the loading zone-with a robust butt and tip section to create create a radically different shaft load profile during the downswing. Remember the Project X Mantra: It's not how fast you swing it, it's how you swing it fast!