Small box respirator The small box respirator consists of a face mask made of rubberized fabric connected by a rubber fabric hose to a canister made of tinplate containing a chemical absorbent. The respirator mask is light in weight and is made from khaki cotton fabric that is plated with a thin layer of black rubber.MOPP protective gear Protective mask Commonly referred to as a gas mask or pro mask. It is designed to filter harmful chemical and biological agents, as well as irradiated particles from the air to allow the wearer to breathe safely.Respirator assigned protection factors Measurement of protection factors of negative pressure full face masks with highefficiency filters in the laboratory revealed a risk of decrease in protective properties to a small values. Therefore, the use of such respirators has been limited to the values 50 or 100 PEL in the United States.Surgical mask Surgical mask also remind wearers not to touch their mouth or nose, which could otherwise transfer viruses and bacteria after having touched a contaminated surface. A surgical mask, by design, does not filter or block very small particles in the air that may be transmitted by coughs, sneezes, or certain medical procedures.Respirator Additionally, airpurifying respirators may come in many forms: filtering facepiece respirators consist solely of a disposable mechanical filter elastomeric respirators are reusable but have replaceable filters attached to the mask and powered airpurifying respirators have a batterypowered blower that moves the airflow through the filters. According to the NIOSH Respirator Selection Logic, airpurifying respirators are recommended for concentrations of hazardous particulates or gases .Powered airpurifying respirator A powered, airpurifying respirator PAPR is a type of personal protective equipment used to safeguard workers against contaminated air. PAPRs consist of a respirator in the form of a hood, or fullface mask, which takes ambient air that is contaminated with one or more type of pollutant or pathogen,.M40 field protective mask The M40 field protective mask was one of various protective masks used by the United States Armed Forces and its allies to protect from field concentrations of chemical and biological agents, along with radiological fallout particles. It is not effective in an oxygen deficient environment or against ammonia.Surgical mask A surgical mask, also known as a procedure mask, is intended to be worn by health professionals during surgery and during nursing to catch the bacteria shed in liquid droplets and aerosols from the wearers mouth and nose. They are not designed to protect the wearer from inhaling airborne bacteria or virus particles.M40 field protective mask The M40 field protective mask was one of various protective masks used by the United States Armed Forces and its allies to protect from field concentrations of chemical and biological agents, along with radiological fallout particles. It is not effective in an oxygen deficient environment or against ammonia. History. US Navy Seabees jog during an exercise with M40s worn. The M40 was the result .M17 gas mask Filter elements in the face piece prevent harmful agents from entering the mask. The M17 series includes three types of masks, the M17, M17A1 and M17A2. An experimental transparentsilicone model called the XM27 was designed in late 1966, but was turned down in favor of the XM28E4. Many countries have copied the M17 design. Notable copies include the Bulgarian PDE1, Japanese Type3, the .Respirator assigned protection factors These measurements showed that if the efficiency of filters is sufficiently high, then the gaps between the mask and the face become the main way of penetration of air contamination under the mask, in the same way that on a cold day, a person wearing a warm jacket and pants will lose most of their heat through the head and extremities.S6 NBC Respirator Although made obsolete by the introduction of the S10, production of the S6 continued in Turkey after the adoption of the new mask by British forces. During the widely documented Iranian Embassy Siege of 1980, the S6 is the mask seen being worn by SAS troops.