Stealth UDI is designed with a Tour-inspired shape and traditional look in the playing position. The center of gravity (CG) has been positioned for a penetrating ball flight while creating the spin required to shape shots. Engineered with an ultra-thin forged 4140 face and Inverted Cone Technology to create a flexible face, Stealth UDI delivers a large sweet spot for maximum distance, playability, and forgiveness with incredible feel. Newly engineered SpeedFoam Air is 69% less dense than its predecessor. The weight saved has been redistributed in the head design to further optimize mass properties for better launch conditions. The new SpeedFoam Air delivers a sweet sound and solid feel, while allowing a fast, flexible face design. The Thru-Slot Speed Pocket provides increased face flexibility while preserving ball speed and distance on low face strikes.