⏱️ Estimated reading time: 10 min
Key Takeaways
Earplugs first, then safety glasses, the respirator and the hard hat. Check the plug seal after each item goes on.
Yes. The arms lift the cushion off the skin, costing a few decibels, more with thick arms.
Yes, using helmet-mounted ear defenders tested to EN 352-3. The rating holds only for the helmet and cup pairing that was tested.
No. Earplugs sit in the ear canal, away from the face seal. HSE asks you to wear any PPE that could interfere during the fit test.
Yes. Straps, a lifted hard hat or a long conversation can work a plug loose, so press and check after each change.
Yes. Regulation 5 of the PPE at Work Regulations 1992 says items worn together must be compatible and stay effective.
The safest way to wear hearing protection with a hard hat, safety glasses and a respirator is to put earplugs in first and fit everything else around them, checking the seal after each item. Searches for ear protection for hard hats mostly end at helmet-mounted ear defenders, but the whole stack has to seal.
On Arbtalk, a UK arborists’ forum, one climber said his ear defenders never sealed with glasses on, so he wedged wood between helmet and cup for extra clamp. The seal is what fails when PPE piles up.
At Bollsen, we make reusable silicone earplugs trusted by 1,000,000+ people. Our hub on earplugs for work covers noise levels, UK rules and protector choice for construction, factory and warehouse jobs.
Why does other PPE break the seal on ear defenders?
Ear defenders tested to EN 352-1 protect only while the cushion sits flat on skin all the way round the ear, so anything that crosses it, such as glasses arms, respirator straps, a hard hat harness or long hair, opens a gap for noise.
HSE’s hearing protection guidance lists spectacles, long hair and woolly hats as things that interfere, and asks employers to plan around hard hats, dust masks and eye protection.
That clash often decides between earplugs and ear defenders. Our comparison of earplugs vs ear defenders at work weighs comfort, heat and fit for each type.
What order should you put on earplugs, glasses, a respirator and a hard hat?
Put earplugs in first, then safety glasses, the respirator and the hard hat, so each layer goes over the one before, and check the plug seal after every step, because straps and a helmet can work a plug loose.
- Earplugs. Pull the ear up and back and push the plug in until both lamellae sit in the canal. Cup your hands over your ears: if noise drops a lot, it is not sealed.
- Safety glasses. Slide the arms on above the ears, clear of the plug.
- Respirator. Run the straps over the crown and round the neck, below the ears. Do your seal check, then press each plug home.
- Hard hat. Set the harness so the rear band clears your ears, and lower the hat straight down.
- Final check. Re-seat both plugs and repeat the test after breaks, long conversations and whenever the hat or respirator comes off.
Our guide on how to put earplugs in and check the fit shows the insertion and seal check you repeat at step five.
How does each piece of PPE affect hearing protection?
In a PPE stack, arms and straps cross an ear defender cushion and brims or visors push on the cup, while an earplug in the ear canal mostly needs re-seating once the other kit is on.
| PPE item | What it does to a muff seal | What to check with earplugs | Helmet-mounted option |
|---|---|---|---|
| Safety glasses | Arms lift the cushion; a few decibels lost | Arms clear of the plug | Same leak; choose thin, flat arms |
| Respirator (FFP3 or half-mask) | Straps under the cushion open a gap | Re-seat after the seal check | Route straps below the cups |
| Hard hat | Brim and harness push the cup off the ear | Re-seat after lifting the hat | EN 352-3 cups; tested pairing only |
| Visor or face shield | Lowered visor can press the cup | Check after lowering | Check clearance with both down |
| Welding helmet | Headband sits where the cushion seals | Re-seat after flipping the shell | Rarely practical; plugs are usual |
Do safety glasses reduce the protection from ear defenders?
Yes, safety glasses reduce the protection from ear defenders, because each glasses arm lifts the cushion off the skin where it crosses, and lab tests of defenders worn with glasses usually find a loss of a few decibels, more with thick or wide arms.
HSE already takes 4 dB off calculated protection for real-world fit in L108 Controlling noise at work. Defenders that only just reach the target can fall short once glasses go on.
Choosing ear defenders for glasses wearers? Look for thin, flat arms. Earplugs avoid the problem, as the arms have no cushion to cross.
Do earplugs get in the way of a respirator fit test?
No, earplugs sit in the ear canal, away from the face seal of a disposable FFP3 or half-mask respirator, so they never touch the edge a fit test checks, and HSE asks you to wear any interfering PPE during the test.
HSE’s INDG479 guidance on RPE fit testing lists a change in other head-worn PPE as a reason to review the test, so tell your fit tester when yours changes.
With ear defenders, run the lower strap below the cup so nothing sits under the cushion.
Are helmet-mounted ear defenders the answer for a hard hat?
Helmet-mounted ear defenders, tested to EN 352-3, clip into slots on a hard hat and swing down over the ears, which removes the headband clash, but the rating is valid only for the tested helmet and cup pairing.
They add weight and heat, so wearers often park the cups up and forget to drop them.
Some workers wear plugs under the cups for the loudest jobs. Our guide to double hearing protection explains when that stack is needed.
What about visors, face shields and welding helmets?
A visor or face shield hinged on a hard hat can press on an ear defender cup as it comes down, and a welding helmet headband sits where the cushion seals, so check both with the shield lowered.
Another Arbtalk thread described a visor that broke the muff seal every time it came down, and the replies said switch to plugs. Outdoor crews will find more in our guide to hearing protection for mowing and landscaping.
Under a welding helmet, a plug stays put when you flip the shell. Our guide to earplugs for power tools and woodworking covers the grinding and cutting either side of a weld.
Why do in-canal earplugs sidestep the clash?
In-canal earplugs tested to EN 352-2 sidestep the PPE clash because their seal sits inside the ear canal, out of reach of arms, straps, brims and visors, so the rest of the kit goes on without breaking it, provided you re-seat the plugs afterwards.
Our WorkPRO earplugs are low-profile, and their yellow stays visible under a hard hat brim for a supervisor’s compliance check. They are passive silicone plugs rated SNR 24 (H 24, M 21, L 19), with attenuation rising with frequency.
For steady noise in HSE’s 90–95 dB(A) band, our WorkPRO earplugs (SNR 24 dB, £29.95) fit under the whole stack without moving anything.
Our guide to earplugs for construction workers covers site jobs, noise levels and the PPE stack worn on site.
How do you stay comfortable in full PPE across a long shift?
Comfort over a long shift comes down to pressure points, so set glasses arms, respirator straps and the hard hat harness clear of the ears, and pick a plug size that seals without pushing hard.
Wash the plugs with mild soap and water at breaks. Our guide to wearing earplugs all day at work goes further. If your ears feel sore, itchy or blocked, ask a GP or pharmacist.
Does the law say your PPE has to work together?
Yes, regulation 5 of the Personal Protective Equipment at Work Regulations 1992 says that where you wear more than one item of PPE at once, the items must be compatible and continue to be effective against the risks, and that duty covers hearing protection.
Regulation 3(3) switches off most of the 1992 rules where the Control of Noise at Work Regulations 2005 apply, but leaves regulation 5 on compatibility in place. Regulation 8 of the Noise Regulations adds duties on maintenance and full and proper use.
Our guide to employer hearing protection duties sets out what must be provided, including the rule that PPE worn together must be compatible.
What is the quickest way to get the whole stack right?
Plugs first, then glasses, respirator and hard hat, with a press and check after each. Test ear defenders with the kit you actually wear. If the clash keeps winning, an in-canal plug takes the seal out of the argument.
His connection to hearing protection stems from personal experience with sound sensitivity during live events and work in noisy environments, an issue that made him more aware of the long-term risks of unmanaged noise exposure. Today, as both a communicator and a user of BOLLSEN products, he is passionate about raising awareness around the importance of proactive hearing care.
At BOLLSEN, he develops data-driven marketing campaigns, writes SEO-focused articles, and manages communication channels that connect customers with practical knowledge about hearing protection. His work ensures that BOLLSEN’s message—prioritizing health, performance, and sustainability reaches a global audience in an engaging and trustworthy way.
Passionate about writing since childhood, Timotej combines creativity with a strong analytical approach, continuously testing new ideas in digital marketing, performance advertising, and social media. He believes in learning through innovation and collaboration, balancing leadership with openness to new perspectives.
Beyond his professional role, Timotej is committed to a healthy lifestyle and finds inspiration in fitness, sports, and quality time with friends. His personal passion for well-being aligns with BOLLSEN’s core values, making his work not only a career but also a cause he deeply believes in.