- Function: Anti-smog PM2.5 Dust ,Protective effect≥ 95% - Specifications: 5 layers of filtration - Applicable object: adults - Safety standard: China GB2626-2006 standard - Nose clip design,invisibles aluminum nose clip - Elastic ear hook,high elastic band design,comfortable to wear - Non-woven fabric,protect your health - 3D stereo shape,Fit the contours of the face,keep breathing smooth - Individually packaged, safe and hygienic