Bags on Heads?

Typically, Safety Goron Says: Don't put plastic bags over your head!

However, another safety-minded individual sent me this link, and when I got done speculating on the whether or not it is a joke (and it isn't) I thought it might be worth sharing.  Ladies and gentlemen, for your smoke-inhalation-prevention pleasure, I give you: The Smoke Escape Hood!

The idea, apparently, is to give the wearer time to breathe filtered air while escaping from a fire, which  is based on the fact that smoke inhalation is the leading cause of death in household fires. (Check out the CDC Fact Sheet on Fire Deaths and Injuries here.) I'm not quite sure how effective this device would be- note that the product description specifically notes that it does not filter toxic gasses - but apparently there is quite a market for these types of devices. I did a quick Google search for "smoke escape hoods" and came up with no less than ten different vendors of various products similar to this one. The primary market seems to be individuals in high-rise buildings, where evacuation may take up to 30 minutes.  I'm still not sure how I feel about encouraging people to put bags over their heads, but I'm open to dialogue. So, if anyone has insight, thoughts, myth debunking material, personal use testimony, or other commentary about this product, let's hear it.