Product Overview: Women's Callaway XR '16 Driver For the Callaway Lady XR Driver , Callaway worked with experts at Boeing to redefine what's possible with ball speed and aerodynamics. Callaway engineered their most forgiving shape ever and Boeing made it fast with a re-engineered Speed Step Crown. This thing is big and fast like you wouldn't believe, with a high speed head and lower drag in the crown that, as you can guess, is going to add some serious ball speed. It's extremely forgiving from the larger shape for more MOI, a stretched out crown with a bigger footprint, and a Center of Gravity that's lower and deeper. For more ball speed all across the face, Callaway added their next generation R*MOTO face that's lighter and up to 19% thinner. You want the ultimate in ball speed? We’ve got it right here. Features: Forgiveness Meets Fast From Our Most Aerodynamic Head Shape And A Speed Step Crown Callaway worked with the aerodynamics experts at Boeing to reach a completely new threshold of ball speed. They made this a high head speed design with low drag, and did it by pinpointing the size and placement of their re-engineered Speed Step Crown to save weight and add more ball speed. That's how XR 16 sets the standard in aerodynamics for fast speed and more distance. Extreme Forgiveness This driver is extremely forgiving, and that's what happens when you develop a larger shape for MOI, stretch out the crown with a bigger footprint, and put in a Center of Gravity that's lower and deeper. All this forgiveness leads to more ball speed at every impact location, which can add more distance for all golfers. Even More Ball Speed With A Faster Face We've stepped up our game with next generation R*MOTO Face Technology that's up to 19% thinner and the body is lighter too, which leads to more ball speed across the face. Callaway has taken this saved weight and redistributed it in the clubhead for even more MOI. When you combine the faster face with the extreme forgiveness in this driver, you can pick up a lot of ball speed, whether you hit it dead center, off the heel, or off the toe. Doesn't matter.