O le oloa e fa'atatau ile EN149 fa'ata'ita'iga fa'ata'ita'iga: masini fa'amama fa'amama-fa'amama fa'ama'oti semi-mask; Tulaga fa'ata'atia: BS EN149:2001+A1:2009 Fa'amanava masini fa'amama-fa'amama fa'ailoga semi-mask mana'omia fa'ailoga su'ega 8.10 poloka poloka, EN143 7.13 ma isi tulaga fa'ata'ita'iga.
Polokalama faʻataʻitaʻiga suʻega: o le faʻamama ma le matapulepule poloka e faʻaaogaina e suʻe ai le aofaʻi o le pefu na aoina i luga o le faamama, le faʻafefe o le manava o le faʻataʻitaʻiga faʻataʻitaʻiga ma le faʻaogaina o le faamama (permeability) pe a oʻo atu le ea i totonu o le faamama e ala i le suction i se tasi. si'osi'omaga pefu ma o'o atu i se fa'alavelave fa'amama.