Standard GB2626-2006 Filtering rate >=95% Inspiratory resistance <=350 Pa Expiratory resistance <=250 Pa Multi-layer design Breathable and comfortable Portable and fordable Anti coronavirus mask Product Antivirus mask N95 mask Material PP nonwoven, activated carbon layer, melt blown filter, soft cotton, PP nonwoven Size 10.5x15.5cm or customized Colour white/gray / black / Certificate CE, FDA, ISO Standard GB2626-2006 EN149:2001 ISO 9001:2015 International Quality