To celebrate the 10th anniversary of its Free technology, Nike premieres a special homage collection of both new and revived models including the all new Nike Free 3.0 Flyknit. If you ever wondered, the numbering system that appears on the sole unit indicates how much cushioning that particular model possesses, where 0 is practically barefoot and 10 designates your normal running shoe. So for 2014, the Free sole receives a complete overhaul fueled by scientific data and athlete insight. The new hexagon-shaped strategically-engineered flex grooves through its arch helps ensure natural movement from no matter where its wearer’s foot strikes the surface, thus providing more energized transitions and superior flexibility. The above range – set to release April 4 – includes the aforementioned Free 3.0 Flyknit as well as the Free 4.0 Flyknit, Free 5.0, Free Trainer 3.0, Free Trainer 5.0, Free 1.0 Cross Bionic, Free Breathe and the Free OG.