The concept of Nike Free was born 12 years ago. Next week, the Nike Free RN Motion Flyknit will propel that original technology even further. The newest Free RN features the auxetic sole that mimics the biomechanics of your feet to provide a more natural ride. After reviewing many studies, Nike also made updates to the Flyknit upper. This year, it’s more pliable and stretchier than ever before. The sleek Flyknit construction tops off with a sock-like collar that creates a second-skin fit. The upper and sole work symbiotically with the sole to deliver the perfect and most natural ride of any Free.