Nike Free Flyknit 4.0 Black Volt Bright Crimson Men's - 631053-009 - US
Nike Men's Free Run 4.0 V4 Running Sneakers from Finish Line - Macy's
Have used these Nikes back in 2015 ( Nike Free 4.0 v3). Personally loved the comfort of these shoes. I can't find these anymore where I live ( not in the US).
Nike Free Flyknit 4.0 Women's 7 Black Green Running Shoes 631050-003 | eBay