Evolve your game. The Stadium 90 takes elements from the greats and forges them into something entirely unique. Combining iconic design elements from the AJ1 and AJ5, this is a new classic with an emphasis on comfort, durability and stability. Benefits The moulded collar is inspired by the AJ5. The AJ1-inspired rubber outsole provides everyday traction. A tonal stitching design detail echoes the iconic fire graphic from the AJ5. Durable upper is made from real leather, synthetic leather and textile materials. Nike Air technology absorbs impact for cushioning with every step.