It's called the "Better Marriage Blanket" and is supposed to absorb noxious bodily odors. The advertisement claims that the carbon fabric lining of this blanket keeps flatulence beneath the covers. It also suggests that the blanket would make a great wedding or anniversary gift.
http://www.bettermarriageblanket.com/ via Geekologie
How many times can you wash it? Or can you?? Maybe you just have to air it out... or what?
totally dying laughing here...
And the comments are good, too!