SAFEBUILDER NRR 27 Ear Muffs (SNR 33dB) - Passive Over-the-Head Hearing Protection, Black
$9.35
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Style: Ear Muffs SNR 33dB Noise Reduction Black Adults Sound Proof
EDITORIAL REVIEW: 4.5/5 WC Safety Review — SAFEBUILDER Safety Ear Muffs SNR 33dB Noise Reduction Black Earmuffs Adults Sound Proof For Sleeping Working Shooting In Editorial assessment by the WC Safety Editorial T...
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EDITORIAL REVIEW: 4.5/5 WC Safety Review — SAFEBUILDER Safety Ear Muffs SNR 33dB Noise Reduction Black Earmuffs Adults Sound Proof For Sleeping Working Shooting In
Editorial assessment by the WC Safety Editorial Team, based on published SAFEBUILDER specifications and category fit. We did not laboratory-test this product.
SAFEBUILDER NRR 27 Ear Muffs (SNR 33dB) - Passive Over-the-Head Hearing Protection, Black Overview
The SAFEBUILDER Safety Ear Muffs are a passive, over-the-head hearing protector carrying an NRR of 27 (ANSI S3.19) - that is the number to plan your exposure against in the US. You'll also see this muff sold as "SNR 33dB," which is the European EN 352 lab figure. SNR and NRR are measured on different standards, so treat them as two labels for the same muff rather than additive numbers - never add or average them.
Be realistic about what any earmuff delivers. A lab-rated NRR of 27 does not mean you get 27 dB of protection on the job. NIOSH recommends derating muffs by 25%, which puts effective protection near 20 dB - still ample for most construction, woodworking, lawn-care, and range scenarios, but a figure you should verify against your measured noise level. For a deeper explanation of the rating, see what NRR means and how it ties into OSHA 29 CFR 1910.95 hearing-conservation requirements.
This is a fully passive muff - no Bluetooth, no AM/FM radio, no amplification or sound-restoration, and no batteries. The sealed cups and padded, adjustable headband simply attenuate noise to the rated level. That makes it a straightforward, low-maintenance pick for shop and outdoor work where you don't need to hear conversation or range commands amplified. If you do want amplified situational awareness, compare against our electronic ear muffs instead. Browse the full ear muffs range or the broader hearing protection catalog to confirm fit for your task.
What It Is Built For
| Use case | Fit | Buyer guidance |
|---|---|---|
| Construction & general industrial (OSHA 1910.95) | Strong | NRR 27 / ~20 dB derated covers most jobsite noise. Confirm against your measured TWA exposure. |
| Power tools, woodworking & shop work | Strong | Sealed passive cups handle sustained 90-100 dB tool noise without batteries to manage. |
| Lawn care, chainsaw & yard equipment | Strong | Over-the-head fit and ~20 dB effective protection suit mowing, trimming and blowing. |
| Gun range & outdoor shooting | Good (passive) | Blocks to NRR 27, but offers no impulse-aware amplification - you won't hear range commands enhanced. Consider electronic muffs if that matters. |
| Use with a hard hat | Limited | This is an over-the-head model; no cap-mount arms are specified. For helmet jobs choose a cap-mount muff. |
| Sleeping & passive quiet | Conditional | Reduces ambient noise to its NRR but does not silence sound. Lighter, lower-profile options may be more comfortable lying down. |
Earmuffs reduce noise, but the labeled NRR is a laboratory number — real-world protection is lower (NIOSH and OSHA both derate it). The muff only protects if the cushions seal fully around the ear: long hair, eyeglass temples, and gaps under a hard-hat-mounted muff all break the seal. In very high noise, wear muffs and earplugs together (dual protection). Electronic muffs amplify quiet sounds and cut loud impulses but still protect only to their rated NRR. OSHA 29 CFR 1910.95 sets the 85 dBA action level; size protection to your measured noise — see how to calculate the NRR you need.
Pros & Cons
Pros
- Passive design - no batteries, charging, or electronics to fail
- NRR 27 (ANSI S3.19) suits most construction, shop, and yard noise
- Over-the-head padded, adjustable headband fits a range of adult head sizes
- Sealed cups deliver consistent, simple broadband attenuation
- Low-maintenance and budget-friendly for high-use environments
Cons
- Marketed SNR 33dB is the EN 352 figure, not the US NRR (which is 27) - do not stack the two
- Real-world protection is lower than the label; plan around ~20 dB after the NIOSH derate
- No amplification or sound-restoration - you cannot hear speech or commands enhanced
- Over-the-head only; no cap-mount arms specified for hard-hat use
- No dielectric/electrical-insulation rating is stated, so do not use near electrical hazards on that assumption
How It Compares
Within the SAFEBUILDER line, this over-the-head muff is the higher-attenuation passive option. The sibling SAFEBUILDER 30dB Cap-Mount Earmuff trades a lower rating for slot-mount arms that clip into a safety helmet, so it is the one to pick for hard-hat work - this over-the-head model is not cap-mount. Both are fully passive with no electronics.
Against other passive over-the-head muffs in the catalog, NRR 27 sits at the upper end. The Radians Def-Guard (NRR 23) is a lighter, lower-rated alternative, while the Moldex MX-6 over-the-head muff is a comparable passive pick. If you need amplified situational awareness for the range, step up to an electronic model such as the Howard Leight Impact Sport; just remember electronic muffs still only protect to their own NRR. For a full side-by-side, see our best passive ear muffs guide.
Specifications
| NRR (ANSI S3.19) | 27 dB |
| SNR (EN 352, as marketed) | 33 dB |
| Effective protection (NIOSH 25% derate) | ~20 dB |
| Technology | Passive (non-electronic) |
| Form factor | Over-the-head, adjustable headband |
| Cap-mount / hard-hat compatible | No (over-the-head model) |
| Dielectric rating | Not specified |
| Color | Black |
| Standard | OSHA 29 CFR 1910.95 hearing conservation |
Related Resources
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Frequently Asked Questions
What is the NRR of the SAFEBUILDER ear muffs?
The NRR is 27 dB under ANSI S3.19 - that is the rating to use for US OSHA exposure planning. The "SNR 33dB" you see in the title is the European EN 352 lab figure for the same muff; the two are measured differently and are not interchangeable.
Why does the title say 33dB but you list NRR 27?
SNR (33dB) comes from the European EN 352 standard; NRR (27) comes from US ANSI S3.19. They rate the same muff on different test methods, so the numbers differ. In the US, plan around the NRR. Do not add or average the two figures.
How much noise will these actually block on the job?
Less than the label. NIOSH recommends derating muffs by 25%, which takes an NRR of 27 down to roughly 20 dB of effective protection. Use our guide on how to calculate the NRR you need to match that to your measured noise level.
Are these electronic or do they amplify sound?
No. These are fully passive muffs - no Bluetooth, no AM/FM radio, no amplification or sound-restoration, and no batteries. They simply block noise to their rated level. If you want to hear speech or range commands amplified, look at our electronic ear muffs instead.
Can I wear these with a hard hat?
This is an over-the-head model and no cap-mount arms are specified, so it is not intended for helmet mounting. For hard-hat work, choose a cap-mount muff such as the SAFEBUILDER 30dB cap-mount earmuff or another slot-mount model.
Are they good for shooting and the gun range?
Yes for protection - NRR 27 covers most outdoor shooting. The trade-off is that, being passive, they won't let you hear range commands or conversation amplified between strings of fire. Shooters who want that should compare electronic muffs like the Howard Leight Impact Sport.
Do these meet OSHA hearing-protection requirements?
They carry an ANSI S3.19 NRR that you can apply under OSHA 29 CFR 1910.95. Whether they are adequate depends on your measured time-weighted noise exposure - the muff must bring you below 90 dBA (and ideally toward 85 dBA) after derating. See our OSHA 1910.95 explainer.
Are these soundproof or will they give total silence?
No hearing protector is soundproof. These reduce noise by their rated amount - roughly 20 dB effective after the NIOSH derate - they do not eliminate sound. Marketing terms like "sound proof" describe attenuation, not silence.
Will these work for sleeping or sensory sensitivity?
They reduce ambient noise to their NRR, which lowers but does not remove background sound. The over-the-head band can be bulky lying down, so a lower-profile passive muff or foam plugs may be more comfortable for sleep.
Are these dielectric or safe near electrical hazards?
No dielectric or electrical-insulation rating is stated for this model, so do not assume it protects against electrical contact. If you need an electrically insulated muff, choose one specifically rated and marked as dielectric.
How do these compare to other passive ear muffs you sell?
NRR 27 puts them near the top of the passive over-the-head range. Lower-rated, lighter options include the Radians Def-Guard (NRR 23); a comparable passive pick is the Moldex MX-6. Our best passive ear muffs guide lays out the side-by-side.
Do I still need ear plugs if I wear these muffs?
Only in very high noise. Doubling up (plugs plus muffs) adds about 5 dB to the higher-rated device's NRR - it does not sum the two ratings. For most jobsite levels these muffs alone suffice; see our ear plugs vs ear muffs guide to decide.
Written by Steven Eaton, WC Safety Editorial. Specifications sourced from SAFEBUILDER published data. Compare the range in hearing protection.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Match the product to your specific hazard and follow your site PPE program.
Brand / Vendor
SAFEBUILDER
Model / SKU
MVP-07B
Product Type
Earmuffs
Price
$9.35 (Amazon)
Rating
5.0 / 5 — 7 reviews
Availability
Check current availability on Amazon
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Verified Buyer Reviews
Customer Reviews
★★★★☆4.5 / 5· 364 ratings on Amazon
★★★★★
Well made, fit nicely and work very well. Comfortable!
Fit nicely and work well for a very reasonable price. I would purchase again.
Verified Purchaser · June 20, 2 · ✓ Amazon Verified Purchase
★★★★★
Works and comfortable
So far I like these! I wanted something to block out sound for reading or studying without distractions. I was worried about a tight vice-grip with these types of earmuffs and bought these for their generally positive reviews, good price and cute colors. Out of the box they did seem very stiff and tight, however, I placed them over the top of a planter pot overnight to stretch them out (pic included here) and they were much more comfortable after that. They are still snug around the ears but I don’t feel that vice grip. I’m someone who gets headaches if I wear a headband all day so I know they may cause discomfort if worn for many hours but they are more comfortable than I expected after the stretching.Oh, and they do block out sound. I find wearing them blocks the bothersome household noises but I have not tried them with loud noises. I like that I can wear earbuds while wearing these too, will be great for air travel. Construction/quality looks solid as far as I can tell. They don’t feel cheap to me.
Verified Purchaser · February 1 · ✓ Amazon Verified Purchase
★★★★★
Look no further
These work great and they are comfortable. Definitely worth the $$
Verified Purchaser · May 25, 20 · ✓ Amazon Verified Purchase
★★★★★
Excellent
Excellent headphones. Noise cancelling is supurbed!!!
Verified Purchaser · June 5, 20 · ✓ Amazon Verified Purchase
★★★★★
Comfortable
I run heavy equipment and these seem to be doing great and comfortable to wear.
Verified Purchaser · May 25, 20 · ✓ Amazon Verified Purchase
★★★★★
Protection need not be expensive.
I don't know why a fairly simple product like safety ear muffs should be expensive but many, many offerings are. These work fine at a reasonable price. I have several pairs of muffs and keep them in the garage, the workshop, the basement, with the vacuum clean so there's always a pair at hand. I worked in high noise environments and think it's important to do something so simple that has such value as use safety equipment for eyes, ears, fingers and toes.
Verified Purchaser · June 27, 2 · ✓ Amazon Verified Purchase
★★★★★
Works great - great price!
When I don't want to be bothered, I wear inexpensive hearing protection to discourage other passengers from attempting interaction. The product fits fine and feels comfortable.
Verified Purchaser · February 4 · ✓ Amazon Verified Purchase
Showing 7 of 364 Amazon reviews.
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