Injection rubber and a thin heel clip reduces weight for better performance. Nike React technology is a lightweight, durable foam that delivers a smooth, responsive ride. Plush and comfortable, Max Air cushioning has just the right amount of support. Foam midsole The Air Max Phoenix is ready to fly. Bouncy and responsive, the Max Air unit combines with a light-as-air upper to create a sleek addition to the Air Max family. This version features a gradient effect that's sure to stand out.