Volkl Tennis racquets have been used by amatuers and professionals alike for the past 90 years (this may be a stretch for tennis. Really since 1980's for tennis). German engineering has made its mark in the automotive world and Volkl has been pushing that famous engineering prowis into the world of tennis. From their bio sensor which reduces shock by 15% to their Organix cellulose filled high tech carbon nano tubes which gives you 30% more dynamic power and handling, Volkl tennis racquets are applying engineering principles to make you a better player. If you are looking for a great racquet that will help you bring famous German enginnering to the tennis court, Volkl is a great choice.