There are some caves about 5 mins from my house that are unexplored due to the big guano piles on the entrance room, so I was wondering what kind of mask could I use to get into those caves to reduce the risk of histoplasmosis?
Will the gas masks found at military surplus stores work? a carbon filter one?
Any help is apreciated.
I found these two
http://www.sportsmansguide.com/cb/cb.asp?a=235060
http://www.sportsmansguide.com/cb/cb.asp?a=133029