Tip one: check the strap
There is standard that all N95 masks cannot be ear loops/ear wearing. N95 masks are designed in headband/head wearing that go around the head. Users can adjust the straps to keep a suitable attachment to the face.
Tip two: check whether the TC number was printed on the mask’s surface.
There is a standard for N95 masks that tc number(TC-84A-XXXX) must be printed and visible on mask’s surface.
Tip three: further Verify the authenticity and existence of TC number via Https: //wwwn. Cdc. Gov/niosh-cel
Tip four: purchase N95 masks from brand owner and its official distributor.