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  2. M40 field protective mask - Wikipedia

    en.wikipedia.org/wiki/M40_Field_Protective_Mask

    The M40 field protective mask features three voicemitters, one on either the right or left side, and one in front. A voicecom adapter may be placed over the front voicemitter to amplify the user's voice. The mask can be adjusted in the field to accept the filtering canister on either side, so that a weapon may be shouldered.

  3. Flight helmet - Wikipedia

    en.wikipedia.org/wiki/Flight_helmet

    By World War II, improved oxygen masks became common as planes flew higher where thinner air required a breathable air supply to the pilots and crew. [8] After World War II until the Korean War, the leather headpiece was gradually replaced with a hard helmet to provide head protection during bailing out (and later with high velocity ejection). [9]

  4. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    During the COVID-19 pandemic, the mask and respirator market rapidly grew, along with counterfeit respirators. [1] NIOSH, on behalf of the Department of Health and Human Services, filed a trademark application on June 17, 2020, for various 42 CFR 84 trademarks, including the N95, allowing NIOSH to enforce rules on counterfeit masks outside of rules defined in 42 CFR 84.

  5. List of headgear - Wikipedia

    en.wikipedia.org/wiki/List_of_headgear

    Victor Oladipo wearing protective headgear. See Mask for a fuller list of masks. Balaclava (helmet) or ski mask; Battoulah; Bongrace – a shade for the face, sometimes part of a hood, or a separate garment worn with a hood or coif; Tudor/Elizabethan; Boushiya; Burqa, also burka, burga, burqua; Diving mask; Full-face diving mask; Gas mask ...

  6. List of combat helmets - Wikipedia

    en.wikipedia.org/wiki/List_of_combat_helmets

    Improved and stronger variant of the M80 helmet, this version has a distinct cover M83 helmet: South Africa: 1983: Paratroopers of the South African Army: Variant of the OR-201 helmet M87: South Africa: 1987: South African Army: Similar to US PASGT Kevlar helmet, replacing earlier Israeli-style helmet in use since the 1980s M90 Helmet: Iraq

  7. Respirator assigned protection factors - Wikipedia

    en.wikipedia.org/wiki/Respirator_Assigned...

    The respiratory protective devices (RPD) can protect workers only if their protective properties are adequate to the conditions in the workplace.Therefore, specialists have developed criteria for the selection of proper, adequate respirators, including the Assigned Protection Factors (APF) - the decrease of the concentration of harmful substances in the inhaled air, which (is expected) to be ...

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