Nike Free Run 2 Id Running Shoe REMAKE THE INSTANT CLASSIC The Nike Free Run 2 Id Running Shoe Delivers the Natural-Motion Benefits of Running Barefoot With a Super-Flexible Yet Supportive Midsole and Ultralight Upper. The Minimalist Design Helps Strengthen the Foot and Ankle by Working Core Muscles That Aren't Activated in Conventional Running Shoes, While New Color and Design Options Allow You to Personalize the Look. Run Free. Run Wild. On the Overlay, Express Yourself With a Wild New Design: Snake or Zebra. Or, to Keep It Simpler, Stick With a Solid (Yet Striking) Color Like Atomic Orange or Gamma Blue. Make It Unique Build on Your Shoe'S Custom Look by Adding Paint Speckles to the Midsole, Available in Every Color From Pink Foil to Flash Lime. Plus, Choose the Colors of Every Part of Your Shoe, Including the Underlay, Laces, Swoosh, Heel and Lining, Midsole and More. Perfect The Fit On This Edition of the Nike Free Run 2 Id, You Can Choose the Width That Feels Best While You Run, From Regular to Wide. Nike Free Origins After Learning That Stanford Athletes Had Been Training Barefoot on the University's Golf Course, Three of Nike's Most Innovative and Creative Employees Set Out to Develop a Shoe That Felt Natural and Weightless, Just Like Bare Feet. In 2002, They Examined a Group of Men and Women With Pressure-Measuring Insoles Taped to Their Feet, Using High-Speed Cameras to Capture Images of Each Foot in Motion. The Team Spent Eight Years Studying the Biomechanics of Shoeless Running. The Results Yielded a Profound Understanding of the Foot's Natural Landing Angle, Pressure and Toe Position, Allowing Nike Designers to Build an Unconventional and Flexible Running Shoe From the Inside Out. More Benefits •Breathable Mesh Upper With Optional Reflective Elements for Enhanced Visibility •Phylite Midsole and Outsole for an Ultra-Lightweight, Resilient Ride •Deep Nike Free Flex Grooves Along the Outsole for Natural Range of Motion and Flexibility Size: 6Y. Color: Grey. Gender: Female. Age Group: Kids.