The Nike Air Zoom Pegasus 39 are men's running shoes ideal for runners with medium or light weight and neutral support. They are very versatile and perfect for all distances.
The midsole has been updated with two Air Zoom units in the forefoot and heel which, working in synergy with Nike React technology, guarantee even greater cushioning and reactivity in all phases of the race. The lighter and more flexible technical mesh upper is supported by the new lacing system, for a perfect fit and an even more precise fit.
With the Pegasus 39 you will be able to increase your records in maximum comfort, lightness and reactivity, without giving up the typical look of the American best seller!!
Details:
Flywire
 Flywire helps provide ultra-lightweight support and comfort for your  foot. It gets its strength from thin nylon fibers strategically placed  on the upper of the shoe to hold the foot in place, helping to reduce  slippage during activity. This allows for a massive reduction in weight  because material is used only where it’s needed.
Zoom
Nike Zoom cushioning is part of the Nike Air family, and—like its  siblings—it’s lightweight and durable. Because Nike Zoom cushioning is  incredibly thin, it brings the foot closer to the ground and enhances  stability, especially during quick cuts and multi-directional movements.  After impact, the tightly stretched fibers inside the pressurized air  unit quickly bounce back into shape, providing a super-responsive feel  and improved awareness of the surface you’re playing on.
Air
Nike  Air units work by trapping air molecules inside a durable urethane  shell. With each footstrike, the air unit compresses to reduce the force  of impact, then immediately recovers its shape to be ready for the next  landing. Nike Air units are built to last, so the cushioning properties  hold steady for the life of the shoe.
Nike React 
Nike React foam cushioning offers support and reactivity. Resistant and soft at the same time returns all the energy you put in every step.