I received this as a gift, but I'm not going to use it, so I'm selling it. Description: This product features a "light and fatigue-resistant" shock-absorbing and rebound material that combines shock absorption and resilience. It's a shock absorber unique to Yonex. The design of the toe area alleviates pressure on the big toe, and by enhancing support for the midfoot and heel, it prevents the foot from slipping inside the shoe, enabling quick footwork without power loss.