Type... Spikes Popular Model/Series... Air Zoom Maxfly Gender... Unisex Thank you for viewing. This is a 27.5 cm prototype model of the Nike Air Zoom Maxfly 2. I only ran 120m lightly once, and there are no air punctures, nor is there any wear on the sole or pins. Compared to the Maxfly 1, the forefoot feels narrower, and there's a sense of improved stability in the air unit and fit around the opening. Thank you for your consideration.