On the high-end is the iEvac Certified Smoke/Fire Hood. It is the only hood certified by SEI (http://www.seinet.org/) and tested by the US Army Research, Development and Engineering Command, and the Edgewood Chemical Biological Center.

It's also designated as an anti-terrorism technology by the US Department of Homeland Security Safety Act.

It also protects against toxic gasses such as carbon monoxide (the number one cause of death and injury in a fire), smoke, hydrogen sulfide, chlorine, ammonia, hydrogen cyanide, sulfur dioxide, tear gas and more.