Description The TF-X1 285 is a next-generation racquet built to boost power while maximizing stability, tolerance and comfort. The frame ergonomics are optimized with a rounded head size and reinforced sections for more power and stability. Isoflex technology, an all-new progressive section design for the most flexible string pattern, allows players to maintain speed and precision with off-center shots. The exclusive shock-absorbing technology X-Damp reduces harmful racquet vibrations by up to 36%, leading to less fatigue and more performance. Who’s it for? Competitive tennis players who want a racquet that combines power, stability, tolerance and comfort. Racquet Technology Iso Flex: Exclusive section design adds stiffness on shorter strings and softness on longer strings for consistent flexibility of the string bed..