Nosefrida Hygienic FiltersDescription HYGIENIC: Disposable filters are clinically proven to prevent the transfer of mucus or bacterial germs to the snot sucker when clearing stuffy noses. Replace filter after every use. 20 HYGIENE FILTERS: Replace hygiene filter after each use to maintain suction effectiveness of the NoseFrida and minimize moisture buildup. BETTER TOGETHER: For seamless snot sucking use these Hygiene Filters with Nosefrida Nasal Aspirator (not included). Whats