3-ply single use filters designed to fit into our Reusable Face Masks designs (#100643, #100684) Intended for single use, slide one inside your reusable face mask filter pocket before each use. Made from the same materials as our single use face mask, #250. Outer layer: PP non-woven. Middle/Filter layer: melt-blown PP non-woven. Inside layer: PP- non-woven. Filter filtration effectiveness specifications: BFE ? 95%. Filters are individually wrapped and packaged in a resealable bag (pack of 10). The outer layer of the filter is Sky Blue and the inner layer is White. The use of a filter inside of a face mask does not make the mask medical grade or a direct substitute for N95, surgical, or procedural masks and should NOT be used as a replacement for conventional and approved Personal Protective Equipment. Filter is not FDA or CDC approved and is for personal use only. The use of a filter inside of a face mask is not a guarantee against infection or the transmission of viruses or diseases. The use of a filter inside of a face mask should be used in addition to practicing the recommended CDC guidelines for hand washing and social distancing. Face masks should not be placed on children under 12 years old. Orders can only be placed in increments of 10. Package Dimensions: 5.9L 8.18H. All sales final. Pricing appearing on the website supersedes any other published prices. Due to high demand, items may take up to 48 hours to ship after purchase order is received