In February 2014 we wrote that protective hoods are the most vulnerable area of the firefighter's ensemble. That's because hoods lack any type of barrier characteristics to keep out the superfine particles that absorb a variety of hazardous chemicals including carcinogens.
This shortcoming was coupled with NIOSH studies and other research showing carcinogen buildup on firefighters' skin, particularly on the neck and face areas unprotected by the SCBA face piece. Further, that skin absorbs chemicals easily around a person's jaw line led to the obvious conclusion that current-day hoods have little effectiveness in keeping out soot.
Then in January 2015, we assisted the IAFF with a study to show how much particle penetration takes place throughout the entire structural firefighting ensemble. After that, there could be no doubt that the hood is one of the serious gaps in firefighter protection that needs to be solved.