At first glance, Nike's Free RN Flyknit 3.0 'Luminous Green' which dropped March 2019, looks like a futuristic slipper. At the heart of the silhouette is Nike Free technology, designed to increase running performance. Initially developed by Tobie Hatfield in 2004, Nike Free technology has become one of the most revolutionary running innovations of all time. With a sock-like Flyknit upper and vibrant Luminous Green colorway, the Free RN 3.0 empowers athletes to find their natural stride.