This beautiful mask holds a removable filter of Halyard H600 sterile wrap. Handmade by Hippodrome Theatre costume designers in Gainesville, Florida. Machine washable, we recommend you lay flat to dry. The liner should be removed for washing and left in the hot sun to decontaminate after 24 hours of use. All of our handmade Hipp Masks come with one filter and a small grey mesh bag for washing. Additional filters, mesh bags, voile storage bags and other accessories are available on our website.