Reusable Dust Masks Medium with 4 Filters (Medium) BFE>98%, PFE>95%.  Each filter can be used for 3-4 days.  So, each bag can last between 12-16 days.
SAFTY & SERVICES - CE, FDA approved.
Dispatch from USA

BFE(Bacterial filtration efficiency)>98%
PFE(Nonoily particle filtration efficiency)>95%

HEALTHY BREATHING: The anti pollution face mask is designed with military grade filtration. Easy Breathe technology filters out the dust, chemicals, particulates, gas, pollen, smoke and fumes.

FIT COMFORTABLE: These dustproof masks have an adjustable ear piece and adjustable nose clip, which make it possible to fit most faces.
REUSABLE AND REPLACEABLE: This dust face mask can be washed when they get dirty, the filter is replaceable.
Meet your different needs - It is suitable for cycling, cleaning, gardening, running, riding and other outdoor activities.

Package Includes:
1pcs x Reusable Face Mask
4pcs x Filters