New and improved, the Streakfly 2 is here to enhance your race day performance. A familiar lightweight upper arrives in a bold 'Bright Crimson', while underfoot, an all-new full-length carbon-fibre Flyplate delivers an energetic propulsion to fuel your run mile after mile. The midsole is crafted from Nike's most responsive foam, ZoomX, for a high energy return, which is supported by a thin, sticky outsole for optimal traction. | HF6416-600, Textile & Synthetic Upper/Synthetic Sole.