Today we got our first out- of-state order. This customer purchased the mask to protect herself from possible particulate pollution as a by-product of geo-engineering. Personally, I need to do some research and testing on the topic in order to be more informed, but I know we deal with pollution by-products all the time. Be safe out there and get your Lave Mask. LAVE means "to clean". Take back your air and breathe.