PPE stands for personal protective equipment, a broad term for any gear worn to protect the body from workplace hazards. This includes everything from gloves and hard hats on a construction site to respirators and gowns in a hospital. PPE is considered the last line of defense: it’s used when other safety measures like ventilation systems or safer work processes can’t reduce a hazard to safe levels on their own.
What PPE Protects Against
PPE is designed to shield you from six general categories of hazard: chemical, biological, radiological, physical, electrical, and mechanical. A chemical hazard might be a solvent that can absorb through your skin. A biological hazard could be an airborne virus in a hospital room. A mechanical hazard might be a piece of metal flying off a grinder.
The type of PPE you need depends entirely on the specific risk. Federal regulations require employers to assess each workplace for hazards and then provide the appropriate equipment at no cost to workers. The goal is to prevent injury or illness through three routes of exposure: absorption through the skin, inhalation into the lungs, and direct physical contact.
The Main Types of PPE
Eye and Face Protection
Safety glasses, goggles, and face shields protect against flying debris, chemical splashes, and intense light. When there’s a risk from flying objects, eye protection must include side coverage, either built into the frame or added with clip-on shields. Safety eyewear sold in the U.S. follows a standard (ANSI Z87.1) that tests for impact resistance, so look for that marking on any pair you buy or are issued.
Head Protection
Hard hats and safety helmets are required anywhere there’s a risk of head injury from falling objects, impacts, or electrical contact. Construction sites are the most common setting, but warehouses, utility work, and manufacturing often require them too. These helmets must meet specific impact and electrical insulation standards.
Hearing Protection
Earplugs and earmuffs reduce noise exposure. The threshold for requiring hearing protection is 85 decibels, roughly the noise level of heavy city traffic sustained over a work shift. The goal is to bring the sound reaching your ears down to between 75 and 85 decibels. For extremely loud environments at 100 decibels or above, workers need double protection: earplugs underneath earmuffs. Every hearing protector comes with a noise reduction rating (NRR) on the packaging, but the actual protection you get depends on fit. Individual fit testing, which generates a personal attenuation rating, is the most reliable way to know your protection level.
Respiratory Protection
Respirators and masks filter contaminated air before you breathe it in. The most well-known type is the N95 respirator, which filters at least 95% of airborne particles as small as 0.3 micrometers. Surgical masks are looser fitting and offer less protection against very small particles. In lab testing, surgical masks filter about 53% to 75% of tiny salt aerosol particles, compared to 95% or more for N95s. The tighter seal and denser filter material of an N95 make it significantly better at blocking airborne pathogens, though it also creates more breathing resistance.
That performance gap shows up clearly in real-world risk modeling. Healthcare workers wearing a surgical mask saw roughly a 60% to 64% reduction in infection risk compared to no protection at all. Workers wearing an N95-equivalent respirator saw an 86% to 95% reduction, and powered respirators with hoods reached 91% to 99% risk reduction.
Gloves
Disposable gloves are made from three main materials, each with different strengths. Nitrile gloves offer the best chemical resistance when your hands are still, with breakthrough times three to nine times longer than other materials. However, nitrile is surprisingly sensitive to hand movement: repetitive motion can more than double the amount of chemical that permeates the glove. Latex gloves hold up better during active hand work, maintaining a more consistent barrier even with movement. Vinyl gloves are the least affected by motion but provide the weakest chemical protection overall, making them best suited for low-risk tasks like food handling rather than chemical exposure.
For biological protection in healthcare, the glove material matters less than proper use. Gloves prevent direct contact with blood, body fluids, and contaminated surfaces, but they’re only effective if changed between patients and if hands are washed after removal.
Protective Clothing
Gowns, coveralls, aprons, and high-visibility vests all fall under protective clothing. In healthcare, isolation gowns prevent infectious material from contaminating a worker’s clothes and skin. In construction and roadwork, high-visibility clothing makes workers visible to drivers and equipment operators. Chemical-resistant suits protect against spills and splashes in industrial settings.
How PPE Fits Into Workplace Safety
PPE sits at the bottom of what safety professionals call the hierarchy of controls. It’s the fifth and final level, used only after other approaches have been considered. The levels above it, in order of effectiveness, are eliminating the hazard entirely, substituting a less dangerous material or process, engineering controls like ventilation or machine guards, and administrative controls like rotating workers to limit exposure time. PPE is the backup plan when those options aren’t enough or aren’t feasible.
This ranking exists because PPE depends on the individual wearing it correctly every time. A ventilation system works whether or not a worker remembers to turn it on, but a respirator only protects if it’s the right type, fits properly, and is worn consistently. That’s why proper training matters as much as the equipment itself.
Putting PPE On and Taking It Off
The order in which you put on and remove PPE matters, especially in healthcare where contaminated surfaces can transfer pathogens to your skin, clothes, or face. The CDC recommends putting equipment on in this order: gown first, then mask, then goggles or face shield, then gloves last. Gloves go on last because your hands are the most likely point of contact with infectious material, and you want them covered for the shortest time before entering the patient area.
Removal follows the reverse logic. Gloves come off first because they’re the most contaminated. Next, remove goggles or the face shield, since they can interfere with taking off other items. Then the gown, touching only the inside and rolling it into a bundle. The mask or respirator comes off last, handled only by the ties or elastic straps to avoid touching the filtered front surface. Hand hygiene with soap or alcohol-based sanitizer is required immediately after all PPE is removed.
Who Regulates PPE
In the United States, three federal agencies share responsibility for PPE standards. OSHA, within the Department of Labor, sets and enforces workplace safety standards, including the requirement that employers provide appropriate PPE. NIOSH, within the Department of Health and Human Services, handles research, testing, and approval of respiratory protection. Its National Personal Protective Technology Laboratory tests and certifies every respirator used in U.S. workplaces. The FDA gets involved when PPE makes specific medical claims, such as a respirator labeled as filtering a certain percentage of viruses or bacteria, or one designed to filter surgical smoke.
For most workplace respirators, NIOSH approval alone is sufficient. But any respirator marketed with claims about preventing specific diseases or killing microorganisms requires additional FDA review. This shared system means that the N95 respirator your hospital provides has been tested by a different agency than the safety glasses on a factory floor, but both are held to defined, enforceable standards.