The Nike Free RN Flyknit 2018 'Anthracite' sneaker, released in April 2018, combines two of Nike’s modern innovations, a Flyknit upper and a Free sole. 2012 marked the arrival of the lightweight Flyknit textile, inspired by feedback from runners wanting a shoe with a sock-like fit. Down below, Nike Free, conceptualized in 2010 by Tobie Hatfield, gives the outsole a barefoot-feel to aid in strengthening the foot.