Review on Dustproof Protection Reinvented: Introducing Sanfiland Activated Replaceable Protective Dustproof by Mark Powell

These masks work very well with sheet masks. Because they are larger, they don't float in the mask like the smaller PM 2.5 rectangles. which ensures you breathe through them and not over, under or around them. Dressing and undressing with sheet masks is a bit awkward, but not impossible. You just need to fold the top to the center, the bottom up, then thread through, tuck the ends in, then unfold the top and bottom and pin.