Where resilience and versatility meet: the Nike Free Trainer 3.0 is one of Nike's many innovations to further develop a sports shoe technology that is modelled on the light, natural feel of barefoot running. The Free 3.0 combines a lightweight, supportive, breathable upper with a highly flexible "natural" outsole. • Mesh upper for consistent breathability with maximum durability • Flywire fibres surround the arch for a firm, yet unobtrusive comfort • Phylon midsole for durable, reliable cushioning