Of all the filters,
Why should be NANO-BEVONDTE?
Most existing masks are less efficient due to moisture generated when breathing in an electrostatic manner.
NANO-BEYONDTEX is 0.1 µm larger than air particles and smaller than harmful particles, and is filtered by the nanofiber structure itself, allowing for long wear and breathability, blocking, and durability.
Air Queen Nano Mask
$3.50Price