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N95 vs P2 vs Surgical Masks: What's the Difference and When Do You Need Each?
Masks and respirators are often talked about as if they're interchangeable. They're not. A surgical mask mainly protects the people around the wearer and blocks splashes; a respirator is designed to filter the air the wearer breathes and to seal to the face.
Key takeaways
- Surgical masks protect others and block splashes; they don't seal to the face.
- P2 (AS/NZS 1716) and N95 (NIOSH) respirators filter airborne particles and must seal.
- A surgical respirator combines particle filtration with fluid resistance.
- Fit testing and a fit check every time are what make a respirator work.
Surgical masks
Surgical masks are loose-fitting and don't form a seal, so air leaks in around the edges. Their job is to catch droplets from the wearer and protect the wearer's nose and mouth from splashes and sprays.
- In Australia, surgical masks are tested to AS 4381, which rates them Level 1, 2 or 3 for fluid resistance and filtration.
- You'll also see the European rating Type IIR (EN 14683): the "R" means splash resistant.
P2 and N95 respirators
Respirators are designed to fit closely and filter airborne particles.
- P2 is the Australian/New Zealand classification under AS/NZS 1716.
- N95 is the US (NIOSH) classification, meaning at least 95% filtration of non-oily airborne particles.
The two are broadly comparable in filtration. A "surgical" P2/N95 respirator adds fluid resistance, so it can be used where splashes are also a risk.
Flat-fold vs cup-shaped respirators
Flat-fold respirators fold flat for storage and open into a three-panel shape that suits many face shapes. Cup-shaped respirators hold their form and keep the material off the mouth. Neither style is "better": the best respirator is the one that fits your face, which is why fit testing matters.
Which one do you need?
| Situation | Usually appropriate |
|---|---|
| General care, reception, visitors, source control | Surgical mask |
| Procedures with splash risk | Surgical mask (Level 2–3 / Type IIR) plus eye protection |
| Caring for people with suspected airborne infections | P2/N95 respirator, fit tested |
| Dust, construction, bushfire smoke | P2 respirator |
Always follow your workplace's infection control policy and current health department advice, which can change during outbreaks.
Fit testing and fit checking
A respirator only works if it seals. Fit testing is a formal test, done when a worker first uses a particular model, that confirms it seals on their face. A fit check is the quick self-check a wearer does every time they put one on. Facial hair under the seal stops a respirator working properly.
Respirators are single-use
Disposable respirators should be replaced when they become damp, damaged, soiled or harder to breathe through, and in clinical settings after each patient, as your policy requires.
Reading the label: what to look for
- The standard: AS 4381 or EN 14683 for surgical masks; AS/NZS 1716 (P2) or NIOSH N95 for respirators.
- Fluid resistance: look for Level 2–3, Type IIR or "surgical" on respirators if splashes are likely.
- Size: some respirators come in more than one size. Fit testing tells you which suits each person.
- Valves: exhalation valves make breathing out easier but let unfiltered air out, so they're generally not used where protecting others matters.
Masks for bushfire smoke and dust
Cloth and surgical masks don't filter fine smoke particles. Health authorities recommend a properly fitted P2 respirator for people who need to be outdoors in heavy smoke, though staying indoors with windows closed is still the main advice. For construction dust, use a P2 respirator as part of your workplace's control plan.
How long does a disposable respirator last?
There's no single number of hours. Replace it when it's damaged, wet, dirty, deformed or hard to breathe through, when it no longer seals, or as your infection control policy requires. Store spare respirators sealed, dry and out of direct sunlight, and check the expiry date.
Shop masks and respirators
Flat-fold and cup N95 respirators, P2 surgical respirators and surgical masks by the box or carton.
Harley N95 Flat Fold 188 →Harley N95 Cup 288 →All masks & respirators →Frequently asked questions
Is an N95 the same as a P2 respirator?
They come from different standards (US NIOSH and Australian/New Zealand AS/NZS 1716) but offer broadly comparable filtration of airborne particles. Many workplaces treat them as equivalent, but follow your organisation's policy.
Does a surgical mask protect against airborne viruses?
A surgical mask reduces droplets from the wearer and blocks splashes, but it doesn't seal to the face, so it offers less protection against fine airborne particles than a fitted P2/N95 respirator.
What does Type IIR mean on a mask?
Type IIR is a European (EN 14683) classification for surgical masks with high bacterial filtration and splash resistance. The "R" stands for resistance to splashes.
Can I reuse a disposable respirator?
Disposable respirators are designed for single use. Some workplaces allow extended use in shortages under a specific policy, but a respirator should be thrown away once it's damaged, soiled, wet or no longer seals.
Related guides
- How to Put On and Fit-Check a Flat-Fold N95 Respirator
- How Much PPE Do You Need? A Stock Planning Guide for Clinics and Care Providers
- Cleaning vs Disinfecting: Getting Infection Control Right in Aged Care and Clinics
Sources and further reading
- Therapeutic Goods Administration (TGA)
- Standards Australia
- Australian Commission on Safety and Quality in Health Care
- healthdirect Australia
Last reviewed: October 2026 by the Innovation Project team.