No-sew upper and bootie fit system for comfort with NanoWeb tech for locked-in support. Low-cut for mobility with Injection molded EVA midsole for lightweight cushioning. Inspired by sports car tires, the Z-rated midsole geometry is designed for improved handling and traction. Gas fueled Carbonated Foam for a light, cushioned and responsive ride. Underfoot grooves let the midsole to flex and expand for extra ground contact and a smooth ride. CRTek rubber only in high wear areas for lightweight durability