Originally posted by jim-bob
i recall about ten years ago, there was a brief fad (?) in which bikers in urban areas would wear these things called "greenscreens", which were activated charcoal filters you put over your nose and mouth. I never noticed too much of a difference from 'em, but the filters would indeed start looking pretty icky after a while.
I tried them when they first came out about 10 or so years ago hated em only wore mine once couldn't breathe properly in them and created a lot of vapor fogged up the old goggles. I see a lady every day wear one of those full face 3M vapor mask they really do not work that well on pollution there are to many particles in the smog clogs up the filters they are designed for fumes. ANd I think that is all the greenscreens were good for also. Same kind of filtering system.