http://www.kn95factory.net/mask/kn95-face-mask/ KN95 external mask Product features: 5-layer structured three-dimensional mask, KN95 specification 0.3 micron particle filter> = 95%. The nose clip is externally attached to the face for easy wearing. Execution standard: strictly in accordance with the technical requirements and test methods of China KN95 specifications: GB2626-2006, basically in line with CE EN149: 2001 + A1: 2009 FFP2 technical standards.KN95 Face Mask in stock website:http://www.kn95factory.net/mask/kn95-face-mask/