The Nike Free RN 2018 Black Anthracite features auxetic shapes for natural foot splaying while offering balanced cushioning underfoot. The updated black/anthracite colorway provides a more adaptive fit than previous versions. It boasts a circular-knit upper with spandex, a dynamic heel system, and a Tri-Star outsole pattern for natural movement. The durability and comfort are achieved through its co-molded midsole, featuring softer injected Phylon (IP), a slightly firmer injected unit sole, and core foam for a smooth ride. Released at a retail price of $100 on February 16, 2018.