Advanced Allergen viral protection 3M Filtrete HEPA filter that effectively help guard against COVID-19 virus. 1500 Filtration Level.

Certified asthma & allergy friendly. 3X better small particle capture. Filters are marked for correct orientation in mask.

Custom design shape and fit for your Joy Li Face Mask.
Includes 3 filters.  Click here for Masks

S- 4 3/4" wide x 3 1/4" high

M/L - 5" wide x 3 3/4" high

Made in the USA.