With the Nike Air Pressure, Nike aimed to create a custom fit support with the use of air in the chambers inside the ankle support. These shoes marked quite a turning point for Nike. An inflatable hand pump device was used to pump air, the more air you pumped, the tighter the fit! The shoe also featured a valve on the back to release air pressure hence the name from the shoe. Unfortunately, Nike Air Pressure were only produced for one year(via nice kicks). ONCE AGAIN, NIKE PLEASE BRING THESE BACK!!! ONCE AGAIN NIKE PLEASE OH PLEASE BRING THESE BACK!!!!