The new and improved Streakfly 2 is here to enhance your race day performance. It features a lightweight upper in a bold 'Bright Crimson' colourway. Underfoot, an all-new full-length carbon-fibre Flyplate delivers energetic propulsion to fuel your run mile after mile. The midsole is crafted from Nike's most responsive foam, ZoomX, for high energy return, supported by a thin, sticky outsole for optimal traction. Model number: HF6416-600. Upper material: Textile & Synthetic. Sole material: Synthetic.