The 8th generation of KD's are the lightest to date, thanks to newNike Flyweave construction. Nike Flyweave construction for lightweight, flexible support and lockdown. Flywire cables on the forefoot help lockyou downduring hard cuts. Phylon for lightweight cushioning. Articulated Zoom Air unit for responsiveness that moves with you for control. Rubber for durability and traction on the hardwood court. Outsole pattern is inspired by the upper's construction for multidirectional traction.