The Nike Free Run 2 is the followup to the Nike Free Run with an improved upper, lighterweight construction, and the same Free outsole millions have grown to love.The Nike Free Run 2 did see a slight price increase from its predecessor bumping up from $85 to $90 at retail.Years before lightweight running became a category of shoes and barefoot running became the latest and hottest trend in footwear, Nike introduced the Nike Free technology website:<strong> http://www.nikelunarshoe.com/</strong>