The Head Speed Lite is the lightest racquet in the Speed Series. It features Head's YOUTEK technology that incorporates a new "smart material" into the frame called d3o. d3o is located in the shaft area where the racquet flexes the most and is able to sense the needs of the player during different strokes. On high impact strokes, the molecules lock together instantly to increase the stiffness of the racquet for more power. On slow speed strokes, the molecules absorb the impact to provide a softer touch for better feel. The Speed Lite is the perfect frame for tweeners who want power, maneuverability, control and feel. Recommended for players with moderate swing styles and for levels 3.0-4.0.