ʻO EN 149 kahi kūlana ʻEulopa no ka hoʻāʻo ʻana a me ka hōʻailona ʻana i nā koi no ka kānana ʻana i ka hapalua masks. Uhi ia mau masks i ka ihu, ka waha a me ka ʻauwae a loaʻa paha nā kiwi inhalation a/a i ʻole exhalation. Ua wehewehe ʻo EN 149 i ʻekolu mau papa o ia mau mea he hapa hapalua, i kapa ʻia ʻo FFP1, FFP2 a me FFP3, (kahi i kū ai ʻo FFP no ka kānana ʻana i ka maka) e like me kā lākou kānana pono. Hoʻokaʻawale ʻo ia i nā masks i 'hoʻohana hoʻohana hoʻokahi wale nō' (ʻaʻole hiki ke hoʻohana hou ʻia, hōʻailona ʻia NR) a i ʻole 'hoʻohana hou (ʻoi aku ma mua o hoʻokahi hoʻololi)' (marked R), a ʻo kahi leka D hou e hōʻike ana ua hala ka mask i kahi hoʻāʻo clogging koho me ka lepo dolomite. ʻO ia mau mea hoʻoheheʻe kānana mechanical e pale aku i ka inhalation o nā ʻāpana e like me nā ʻāpana lepo, droplets, a me nā aerosol.
