Approved FFP1 classification. CN P1 protects against coarse dry and liquid-borne health-hazardous particles such as wood sanding dust, quartz dust, allergenic particles, pollen, concrete dust, chemical particles, polishing dust, etc. Masks are packed in individual hygienic plastic bags with 20 masks in a box and 200 masks in a transport case. Nominal Protection Factor 4 and Assigned Protection Factor 4.