Made for short runs when you want a barefoot-like feel, the Nike Men's Free RN Flyknit 2018 Running Shoe is the lightest in the Free RN family. Its sock-like upper has more stretch yarns than previous versions, so it hugs your feet more than ever. The innovative sole has an updated construction, yet still expands and contracts with every movement. The packable design makes the shoe easy to stuff into your bag - so you can get in a few miles on the fly.Better Fit - This version of Flyknit has added stretch yarns for an even more snug, foot-hugging fit, especially in the heel. The upper is easy to collapse, so you can quickly slide the shoe into your tote or backpack.Breathability - Inspired by the Flyknit Racer, the Flyknit design features more open knit on the sides. This lets air flow freely to help keep your feet cool.All Natural Movement - The soft, lightweight sole mimics your foot's natural movement through its innovative pattern. It expands and contracts with every landing and push-off. This provides a natural feel and a barefoot-like sensation, kind of like an extension of your foot.