Eurosafe FFP1 Valved Flat Fold Particulate Respirator Features: Conforms to EN149:2001 + A1:2009 FFP1 Standards Exhalation Valve for Extra Comfort Low Breathing Resistance With High Filtration Efficiency Adjustable Nosepiece and Inner Foam Provide a Custom Seal Maintenance Free 12 pieces in one Box Design for single shift only