M7 series of masks is our latest generation style and the best series at present！
Sold with 7 Pcs Filters
Due to the outbreak of COVID-19,Our warehouse in California was forced to close， we were forced to ship from China instead of the United States, but the current international logistics shipment speed is very slow！Make sure you can wait 25-35 days or more days delay for shipping before you order
This mask adopts a new patented design with New Design Valve and New Design Mask Filters
Generally, the time recommended by the laboratory that helps us test the filter is 150 hours
Our policy lasts Free return within 30 days, free replacement within 180 days. If 180 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. （KN95 masks and disposable civilian masks Not applicable）To complete your return, we require a receipt or proof of purchase.
Handing time:24 HoursShipping time:7-15 days