RPM Power is perfect if you love the spin and control of polyester strings, but you’re looking for additional “pop” on your shots. Combine RPM Power with your long and fast strokes and you’ll be driving the ball through the court like Dominic Thiem. Or as close as possible. Made in France. Your strings are the engine of your racquet. Half of your racquet’s performance comes from your strings. Which means choosing the right string is important. We invented tennis string in 1875. And we’ve been innovating ever since, so you can play your best and enjoy the game more than ever.