Scarcity of PPE materials during the onset of the COVID 19 pandemic drove a design with very minimal parts, readily accessible filter medium, and universal fit. Discovering Sterilization Wrap (a very readily available material) and its filter properties being close to an N95 rating was the first step. Universal fit, and market available elastic drove the shape of the silicone interface piece and outer ring design. planning for further material shortages the diameter of the filter piece was matched with that of Cotton Rounds found in stacks of 500+ in any beauty section, allowing for a cotton "fall-back" filter medium.