From Wiki:
http://en.wikipedia.org/wiki/Blunt_(cigar)

This is directly from a national blunt wrap manufacturers web site:
Blunt Wrap Product

"This is a packaged cigar tube for holding an end user's tobacco fill material comprising a sheet of material made of tobacco leaves and/or homogenized tobacco paper."




Blunts are not recommended for medical use. They give you all the poisons of cigarettes without a filter.