Designed for runners with a neutral gait, the Nike Air Relentless 4 provides superior cushioning through the use of Reslon foam, a Nike Air unit and rubber blades on the outsole. The trainers provide optimal support through Aeroply technology to create a comfortable fit throughout your stride. It features a midfoot webbing system that cinches around your foot for a personalized fit and the Nike Air unit in the heel provides long-lasting cushioning. The single layer mesh offers lightweight breathability and the waffle outsole provides great footwear traction.