US Patent 7475434 Helmet with in-mold and post-applied hard shell

The invention is related to a helmet having an interior foam liner with at least two shell portions. The helmet includes an exterior in-mold shell portion covering a portion of the liner. The helmet also includes an exterior post-applied shell portion covering a portion of the liner that is not covered by the in-mold shell portion. The helmet includes conduits located between the liner and the post-applied shell portion for ventilation and air flow useful for removing the heat generated by a user.