 [ Symptoms ] as an asthmatic taking the bus a lot i am around 2nd hand smoke so much that my asthma is worsening mask recommendation i want to know if there is a mask i can wear while waiting for the bus when i can not get away from smokers i went online searching and could not find anything all the websites i visited said it was impossible to really filter the cigarette smoke completely so is there a mask that will do a fairly good job maybe i can wear two of those masks at the same time to better help myself thank you [ Disease ] i wear a 3m 8210 respirator n95 mask have used it when i was a painter and also working on the farm in all the dust also have sometimes put a damp kleenex inside it for further relief