DOST MASK PRODUCTS DO NOT HURT EAR. Our masks are very comfortable with an invisible and adjustable nose clip suitable for the face shape. It is produced from nonwoven fabric with fine particle filtration material. Ultrasonically welded ear cups are compatible with every head shape. It has a design that facilitates breathing and does not cause deformities caused by collapse. It is designed to fit the head ergonomics and to include the mouth and nose. Our masks provide protection against solid particles or water-based aerosols in the ambient air. Each of the anti-pollution is offered in a separate package. Color & In-box Menstruation White 10 pcs Box (Single OPP Packed in a Box) & 10 Box White Individual OPP Black Individual OPP Black 10s Box (Single OPP Packed in a Box) & 10 Box Filtration: BFE>99% The BFE (Bacterial Filtration Efficiency) value has been registered as buyuk from 98% with the test reports taken in accordance with EN 14683 Standards.ercercev.