Clock your best running time with the Nike Free Run 5. 0 2021. Made with a carefully knit upper for superior breathability and all-day style, its Flywire technology loops through the laces on the side for precision support and stability. Featuring laser-cut flex grooves for improved flexibility and comfort, this running shoe from Nike stays on point to take on any challenge! Nike Free Run 5. 0 2021 features: Pull-tab at the heel helps avoid unnecessary slippage. The updated foam design ensures additional comfort and responsiveness. Cushioned heel construction provides superior protection at impact zones. Contains at least 20% recycled content.