1: The newly upgraded Qingfeng 9.0 outsole adopts a hollow breathable TPU design in the midsole to increase ventilation while improving the stability of the shoe. The light-bounce technology midsole material is lightweight and soft, with excellent performance and faster running. (The weight is reduced by 60g compared to the previous generation, and the softness is increased by 10%) 2: The 3D mesh sandwich mesh fabric on the upper is more breathable and cooler; 3: The knob buckle design is convenient and easy to put on and take off. It opens with one lift and tightens with one press and one turn. Both adults and children can put on and take off quickly. The tension is automatically balanced, allowing the upper to tightly wrap the foot without squeezing discomfort; 4: Double-density anti-mildew and antibacterial insole, double softness, antibacterial and deodorizing.