The Nike Wmns Free RN Flyknit 2018 'Metallic Gold' sneaker features a one-piece upper with a circular logo graphic and an adaptive anatomical heel. Flywire cables are woven into the length of the upper, integrating with the laces for midfoot support. A dual-density Phylon midsole upgrades the classic Nike Free Trainer silhouette, but remains lightweight with a tri-star outsole.