Nike React Infinity Run Flyknit 3 。For runners who know the difference between hype and function. The Nike React Infinity Run Flyknit 3 “Sail” is engineered for serious mileage—designed to help reduce injury risk while delivering smooth, responsive energy return. The Flyknit upper provides breathable, adaptive support, while the React foam midsole keeps every stride cushioned, stable, and consistent. This gently used pair remains in excellent condition, offering the performance integrity runners expect with the clean, understated aesthetic sneakerheads appreciate. The Sail colorway keeps things minimal and versatile—easy to wear beyond the run, without screaming “gym shoe.” Performance-first. Culture-approved.