Nike Epic React Flyknit 2 Men's Running Shoe - Grey The Nike Epic React Flyknit 2 takes a step up from its predecessor with smooth, lightweight performance and a bold look. An updated Flyknit upper contours to your foot with a minimal, supportive design. Underfoot, durable Nike React technology defies the odds by being both soft and responsive, for comfort that lasts as long as you can run. Elevated Responsiveness Nike React foam has a lightweight, durable design that is also ultra-soft and incredibly springy. With every step, the foam responds to your foot by snapping back. The more energy you put into your step, the more you get in return. Lightweight and Secure A lightweight Flyknit upper gives you plenty of stretch and airflow while you run. It contours to your foot for support with every step. A Stable Run The all-new moulding on the heel was informed by runner feedback. It helps keep your foot stable, for an even more secure feel during your workout. Brighter and Bolder Inspired by the' 90s tech world, the design features brighter colours that pay homage to the hand-held gaming devices and desktop computers of that era.