PM 2.5 Mask Filters - 50 pack - Adult Size - NIP

50 count of PM 2.5 Filters (Adult) These PM 2.5 adult mask filters offer 5 layers of protection (please see photos) and are compatible with the vast majority of adult-sized reusable masks with filter pockets. *For occasional use it's best to replace the filter once a week. *For all day/daily work use the filters should be replaced daily. New in Package. Same Day Shipping! **Adult Size Filter, not compatible with children's masks Dimensions: 12cm x 8cm (4.72" X 3.15")