Customer Review: These masks look good and appear to be well made (being an M3 product and all). I purchased them to put in a emergency/earthquake kit. They are packed all in one plastic bag (rather than individually) inside a box. I would recommend this as a good, inexpensive mask/respirator.
Customer Review: We use these because the air quality in our area is not great. Combine that along with normal indoor air polution and it really helps to have such a good filter cleaning our air. It's worth the larger price if you have any kind of allergies or sinus issues at all! Additionally, we have a small... more info