Mask with valve and filter

One mask with 10 filters as bundle Brand New High quality of Mask with Valve on both side. The valve designed to help better breathing. When breathing out, the valve opens to let air go. When breath in, the valve closes, so air come in through the filter. Please message me if you need different amount or combination with other types, filters, and I can combine the shipping cost. Will ship out to you same day or the next day( Except Sunday). Thank you!