At a glance
What matters most
- 01
FFP1 is the lowest-protection filtering-facepiece class under EN 149.
- 02
UK HSE guidance associates FFP1 with an assigned protection factor of 4.
- 03
A tight-fitting FFP1 must be fit tested and seal correctly on the wearer.
- 04
FFP1 filters particles only; it does not protect against gases, vapours or oxygen deficiency.
What the FFP1 classification means
FFP stands for filtering facepiece. FFP1, FFP2 and FFP3 are disposable particle-respirator classes under EN 149, with the number indicating increasing protection. The class is only one part of selection: the product must also be genuine, suitable for the hazard and compatible with the wearer and task.
In UK workplace guidance, an FFP1 is listed with an assigned protection factor (APF) of 4. An APF is a practical selection value used within a respiratory-protection programme; it is not a promise that every wearer will receive exactly that reduction.
| EN 149 class | UK assigned protection factor | Relative protection |
|---|---|---|
| FFP1 | 4 | Lowest of the three classes |
| FFP2 | 10 | Higher than FFP1 |
| FFP3 | 20 | Highest of the three classes |
When FFP1 may—and may not—be suitable
FFP1 may be considered only where a competent risk assessment shows that low-level particle protection with an APF of 4 is adequate. The contaminant, airborne concentration, exposure limit, task duration and other controls all affect the required protection.
Do not choose FFP1 simply because the dust is visible or seems mild. Some substances and tasks—including many fumes, toxic dusts and high-concentration exposures—require FFP2, FFP3, powered RPE or another specifically selected device. Follow applicable workplace guidance and the manufacturer’s instructions.
Fit and correct use
- Select a model and size that passes an appropriate fit test for the individual wearer.
- Keep the seal area clean-shaven and free from hair, clothing and interfering PPE.
- Put the respirator on as instructed and perform a pre-use seal check every time.
- Replace it when damaged, contaminated, difficult to breathe through or when its instructions require disposal.
Important limitations
FFP1 is a particle-filtering respirator. It does not remove gases or vapours, supply oxygen, or make an unknown or immediately dangerous atmosphere safe. Respiratory protection should support—not replace—effective enclosure, extraction, ventilation, wet methods and other source controls.
Frequently asked questions
Is FFP1 the same as FFP2?
No. Both are EN 149 filtering-facepiece classes, but FFP2 provides a higher protection level. UK HSE guidance lists assigned protection factors of 4 for FFP1 and 10 for FFP2.
Does an FFP1 respirator require fit testing?
Yes for a tight-fitting workplace respirator. A fit test checks whether the selected model can seal adequately to the individual wearer’s face.
Can FFP1 protect against fumes or gases?
FFP1 does not protect against gases or vapours. HSE also advises against using low-efficiency particle filters for fume unless the manufacturer specifically guarantees suitable protection.
Is FFP1 suitable for PM2.5?
FFP1 is a particle-filtering class, but that alone does not establish that it is the right choice for a particular pollution level or person. Product authenticity, fit, condition and the required protection level all matter; higher-protection classes may be more appropriate.
Primary sources
This reference was prepared from the following primary public-health and regulatory sources: