Love this mask. It is quick and easy to put on, esp for a quick one cut only... ya right! The filters are easy to change and do a very good job at blocking the dust. Being charcoal activated they can be used for spraying organics, with some ventilation. Highly recommend them!
My mask with filter is effectively keeping all particulates out of my lungs. I have yet to need to charge to a new filter. I would recommend this product to anyone who wants to avoid breathing dust in their shop or on job sites.