http://www.thermahelm.com/cooling-helmet-technology

ThermaHelm™ is a revolutionary brain cooling helmet technology
that could save your life. Riding without ThermaHelm™ technology is like driving
without an airbag.

Head injuries occur in 80% of all motorcyclist fatalities. A key factor in these
injuries is brain swelling inside the helmet and the response time to address
the issue. ThermaHelm™ technology helps to mitigate this problem by cooling the
rider's head post-accident.

A standard helmet acts like an insulator. The polystyrene foam found in ALL
motorcycle helmets is the same white foam that in installed in the walls of ALL
refrigerators and portable coolers. It's the perfect energy absorber...and
insulator. The helmet acts like an oven to an already hot, sweaty head causing
post accident brain temperatures to potentially reach a fatal threshold. This is
how motorcycle riders can die.

ThermaHelm™ technology works by triggering an endothermic chemical reaction
inside the helmet lining at the moment of impact. The helmet immediately cools
the motorcyclists head, keeping it cold even before the emergency services could
have been called.