POKANA Earloop Adult Duckbill Face Mask Box contains 25pcs – Marble Gray is a mask for adults and children that can protect the risk of exposure from ultraviolet rays, dust, vehicle fumes, air pollution, bacteria, and viruses. Equipped with Nano Guard technology that can filter up to 99% of particles measuring 0.3 microns. This mask uses hygienic and allergy-free materials with Form Fit Design Nose-Piece so it is comfortable to use and covers the nose perfectly to the chin.