N99 Organic Vogmasks are made with a solid color organic cotton inner and outer layer, N99 particle filtering media, and a carbon filter. Trim and ear loops are made with latex-free spandex. Vogmask carries the following international respiratory compliance certifications for reusable personal protective equipment: • CE Mark Personal Protective Equipment - filtering half masks for particles, against EN 149:2001 + A1:2009. • CE Certified FFP1 R Personal Protective Equipment (PPE) Directive 89/686/EEC • KF-94 Korean Ministry of Food and Drug Safety, Seoul, Korea KN-94 • KN95 China Personal Protective Equipment • Conforms to NIOSH N99 filter efficiency as stated in 42 CFR Part 84.181 • GB2626-2006 Personal Protective Equipment Certified KN95