Nike Frees have been a popular running shoe throughout the years. Their main feature is a flexible sole that aims to mimic barefoot running as closely as possible. The design was inspired by natural motion. While they certainly serve this purpose, Frees are also popular because of their aesthetic appeal. The body of the shoe comes in an entire rainbow of colors, and everything in between. This allows for uniqueness and customization. The special sole is also often a different color and stands out from the rest of the shoe. The style makes this shoe desirable because it can potentially double as a more “formal” running shoe/sneaker when paired with the right clothes. I’ve seen people wear a black pair with khakis for a formal look, while a neon green sole adds a flash of excitement to the ensemble.