The Head Microgel Raptor Tennis Racquet is an excellent lightweight racquet that will improve any player's game. The Raptor features optimal power and control for easy play. It is a great transitional racquet complimented with new aggresive cosmetics. About HEAD MicroGEL Technology HEAD has combined MicroGEL, a revolutionary silicone-based material, with still and strong carbon composite fibers to create a racquet with incredible responsive qualities. On ball impact, MicroGEL uniformly distributes the impact load around the frame to provide a rock-solid feel and unique touch that have to be experienced to be believed.