Whatever your running level, the Nike React Infinity Run Flyknit 4 is the ideal neutral all-round shoe. Go for short or long runs; the React Infinity Run Flyknit does it all. This makes it suitable for both beginners and experienced runners. Experience the perfect balance between cushioning and responsiveness with this all-round running shoe! Midsole The midsole is made of React foam, a combination of thermoplastic elastomer and ethylene vinyl acetate (EVA) that Nike combined to create the Nike React foam. This unique combination makes the Nike React foam provide great cushioning and responsiveness. Nike uses this foam to minimize running injuries, making it one of Nike's most complete foams. The dual-density midsole (firm foam on the outside and soft foam on the inside) provides responsive cushioning for long-lasting comfort. The midsole is also made of sustainable materials. Upper The upper of the shoe is made of Flyknit. This is a material that is based on a weaving technique and supports the necessary places. Thanks to the FlyEase technology, the shoe is extremely easy to put on and take off. You can open the shoe with a zipper on the heel and a strap over the top ensures a snug fit. Light textiles provide ventilation to keep you cool. The heel overlay provides support and stability during multi-directional twists. Instead of laces, this shoe uses Flywire technology, which uses high-tensile strength wires that function to provide ultimate precision support. Outsole The shoe has a rubber outsole and provides good grip and traction while running. Start your run with the Nike React Infinity Run Flyknit 4 and pursue your goals!