While watching the last MotoGP race at Mugello I saw this device poking out of
Sitting on the starting grid just before a race, riders are uniquely vulnerable to overheating and dehydration. Heat build up from the bikes and the sun reflecting off the pavement can create enormous temperatures and the effects of that can dramatically decrease a rider's performance.
The air flowing into the suit is routed around the rider's body by the internal ventilation already built in (air scoops and ventilation holes capture cooling air and channel it through a race suit at speed) and exhaust it through perforations. The high velocity air flow increases the evaporative cooling effect of sweaty skin, cooling the rider, Alpinestars claims, instantaneously by 14.5 degrees Fahrenheit.
The XA was originally rolled out in 2005 and is now in its third revision, it's only available to professional racers.