For decades, hard hats have been synonymous with construction job site safety.  Their one major flaw, however, is that if workers fall, the hard hat rarely stays on their head, exposing them to possible head injuries resulting from the fall. According to Bloomberg News, the National Institute for Occupational Safety and Health (NIOSH) launched research campaign to determine their effectiveness in protecting against head and neck injuries.  Their findings have not yet been released, but companies have begun to seek out new products, in hopes of reducing injuries.