Review on Dustproof Pollution Replaceable Protection: Advanced Activated Design by Richard Counts

My wife and I love these activated carbon filters because of their shape and because they create an air pocket away from the mouth/lips when worn. A great solution to help with conference-like speech intelligibility while still having to wear a mask. I wear glasses and I think this shape also helps reduce my glasses fogging up, for example when I'm in the shop, walking, breathing a little heavier than usual, I do fog up from normal masks, but the shape of these glasses helps around controlling where my breath is breaks out (more away from the glasses). Also, they fit easily on most masks we've purchased as long as those masks have a little more ribbing of fabric to allow them to "stretch". Two thumbs up for form and function!