The Yonex Aerus Z2 is a very lightweight shoe. Great for players who want to be as fast as possible on the court.It is important to remember that a lightweight shoe will never provide as much support as other, slightly heavier models that are really focused on extra stability or cushioning. This makes this shoe less suitable for players with weaker ankles. POWER CUSHION - The Power Cushion System effectively absorbs the impact energy created by landing on the court and transfers it to the next movement, the take-off. Compared to traditional urethane, Power Cushion delivers three times more energy.POWER CUSHION ＋ - By adding a special insert made of flexible resin, the cushioning in the existing Power Cushion system has been significantly increased by 25% and rebound by 12%. DOUBLE RASCHEL MESH - A special thin, lightweight and durable mesh that provides eight times more air exchange and moisture wicking.DURABLE SKIN LIGHT - Combining rubber-like elasticity with the stiffness of a hard shell, the polyurethane-based Durable Skin Light lets you play lightly on your feet while maintaining a secure and comfortable fit.SYNCHRO-FIT INSOLE - YONEX Synchro-Fit - the insert allows for a better fit of the foot to the shoe, minimizing energy loss. Provides greater fluidity of movement and faster footwork.3D POWER GRAPHITE - A special 3D Power Carbon plate placed in the sole reduces pressure and improves stability during landing.TOE ASSIST SHAPE - The system provides additional support for the big toe, as well as for the metatarsus and heel. Prevents the foot from shifting during sudden foot movements and changes of direction.ROUND SOLE - Round Sole ensures fast and light footwork on the court and guarantees maximum energy transfer to the movement performed.RADIAL BLADE SOLE - Designed for confident change of direction. New sole pattern increases traction in vertical, horizontal and diagonal movements.