Head youTek - the power of YOU Head youTek is a philosophy that YOU should use the racquet and have fun playing with it Head youTek's also use the innovative D30 and Teflon Grommet Technologies Head D30 Technology World's First Dynamic Material Tennis Racquet D30 is a specially engineered material made with intelligent molecules. They flow with you as you move but on shock lock together to absorb the impact energy. In a tennis racquet, this means that for soft shots, the racquet can have a soft touch feel; but can lock up for ultimate power on the hard shots.  This really works as shown by the success of top 10 pros like Andy Murray, Novak Djokovic, and Robin Soderling. Made by D30 Lab for Head.  Click to see their web site.   Head Teflon Grommet Technology Grommets with Teflon friction-reducing polymer Friction is a force that holds back the movement of a string when it comes into contact with a grommet. The new HEAD Grommets with Teflon® friction reducing polymer creates a self-lubricating effect in the base material, allowing the strings to slide through the grommets with nearly no friction for less energy loss, more power, and a bigger sweet spot.   Head MultiZone Grip Single grip with zones of different surfaces Replaces the traditional single material grip with zones of functionally different surfaces. Unique sweat channels Aggressive design One piece design provides a smooth surface for added feel and excellent control Embossed sweat channels provide excellent absorption & superior tackiness New design for a very unique modern look