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DEWALT DPG660 NRR 25 Cap-Mount Ear Muffs - Dielectric, Hard Hat Mount (Yellow/Black)
$17.99
Final price set by Amazon · may vary
EDITORIAL REVIEW: 4.5/5 WC Safety Review — DEWALT DPG660 Yellow with Black Earcups Dielectric Expandable NRR 25 Cap Mount Earmuff Editorial assessment by the WC Safety Editorial Team, based on published DEWALT spe...
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EDITORIAL REVIEW: 4.5/5 WC Safety Review — DEWALT DPG660 Yellow with Black Earcups Dielectric Expandable NRR 25 Cap Mount Earmuff
Editorial assessment by the WC Safety Editorial Team, based on published DEWALT specifications and category fit. We did not laboratory-test this product.
DEWALT DPG660 NRR 25 Cap-Mount Ear Muffs - Dielectric, Hard Hat Mount (Yellow/Black) Overview
The DEWALT DPG660 is a cap-mount ear muff built to clip into the side accessory slots of a compatible slotted hard hat, so the earcups ride with your helmet instead of pressing on a separate headband. That makes it a fit-for-purpose choice for construction, utility, demolition, and grounds crews who already wear a hard hat all shift and need hearing protection that swings into place without juggling a second piece of gear. It carries a Noise Reduction Rating (NRR) of 25 dB measured under ANSI S3.19, and the yellow-with-black-earcups color scheme keeps the muffs visible on a busy site.
Two features drive the buying decision here. First, the cups are dielectric (non-conductive), so the muff adds no metal-to-head conductive path near energized work — relevant for electrical, lineman, and utility tasks. Second, the expandable arms let you rotate the cups down to seal over the ears in noise and lift them clear when you step into a quiet area, which is faster than removing over-the-head muffs and reseating a hard hat. Because the cups depend on the hard hat slots for positioning, fit and seal quality are tied to your helmet — verify your hard hat has standard 30 mm accessory slots before ordering.
Set expectations honestly on protection: the NRR 25 on the label is a laboratory number. Once you apply the NIOSH/OSHA derate, the real-world attenuation is lower, so the practical noise reduction at your ear is meaningfully below 25 dB. Use it to bring your exposure under the OSHA limit, not to chase a headline dB figure. To size protection to your actual job, read how to calculate the NRR you need and review the requirements under OSHA 1910.95. For broader options, browse our full ear muffs and hearing protection ranges.
What It Is Built For
| Use case | Fit | Buyer guidance |
|---|---|---|
| Hard hat construction / demolition | Excellent | Cap-mount design clips into slotted hard hat slots so you keep helmet and muffs together; NRR 25 covers most jobsite noise once derated. |
| Electrical / utility / lineman work | Excellent | Dielectric, non-conductive cups add no conductive path near energized equipment; pair with appropriate arc/voltage-rated PPE. |
| Grounds, landscaping, tree work (with helmet) | Good | Swing-down arms keep ears protected during mowing/chipping and lift clear between passes; requires a compatible slotted hard hat. |
| Standalone use without a hard hat | Poor | This is a cap-mount muff with no headband — it cannot be worn on its own. Choose an over-the-head muff instead from our ear muffs collection. |
| Indoor / firearms range or amplified-sound use | Limited | Passive muff with no electronic amplification or impulse compression; for situational awareness consider electronic ear muffs. |
| Very high-noise impact environments (>100 dBA) | Conditional | NRR 25 derated may not be enough alone; calculate required attenuation and consider dual protection (muff + plug). |
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
- Cap-mount design integrates with a slotted hard hat so helmet and hearing protection stay together
- Dielectric, non-conductive earcups suit work near electrical hazards
- Expandable arms swing down to seal and lift clear between tasks for fast on/off
- NRR 25 (ANSI S3.19) provides solid passive attenuation for general jobsite noise
- High-visibility yellow shell with black earcups stays easy to spot on site
Cons
- Requires a compatible slotted hard hat — cannot be worn standalone without a headband
- Passive only — no electronic amplification or impulse compression for situational awareness
- Real-world attenuation is lower than the labeled NRR 25 after NIOSH/OSHA derate
- Seal quality depends on hard hat fit and slot compatibility, not a dedicated headband
How It Compares
Within cap-mount and hard-hat-compatible muffs, the choice comes down to NRR, conductivity, and whether you want electronics. The DEWALT DPG660 sits in the mid-NRR passive band:
| Model | Form factor | NRR | Type |
|---|---|---|---|
| DEWALT DPG660 | Cap-mount (dielectric) | 25 | Passive |
| Moldex MX-6 (over-the-head) | Over-the-head | See listing | Passive |
| Radians DEF-GUARD 23 | Over-the-head | 23 | Passive |
If you need situational awareness on a range or around equipment, step to electronic ear muffs such as the Howard Leight Impact Sport, which amplify quiet sound and compress loud impulses while still only protecting to their own NRR. To weigh muffs against plugs for your noise level, see ear plugs vs ear muffs.
Specifications
| Noise Reduction Rating (NRR) | 25 dB (ANSI S3.19) |
| Form factor | Cap-mount (attaches to slotted hard hat) |
| Attenuation type | Passive |
| Dielectric | Yes — non-conductive earcups |
| Headband adjustment | Expandable swing-down arms |
| Color | Yellow shell with black earcups |
| Brand / model | DEWALT DPG660 |
| Standalone wear | No — requires compatible slotted hard hat |
Related Resources
ear muffs electronic ear muffs hearing protection noise-canceling headsets best passive ear muffs best electronic ear muffs ear plugs vs ear muffs how to calculate NRR what is NRR OSHA 1910.95
Frequently Asked Questions
What is the NRR of the DEWALT DPG660?
The DPG660 is rated NRR 25 dB under ANSI S3.19. That is a laboratory figure — real-world attenuation at your ear is lower once you apply the NIOSH/OSHA derate, so size it against your measured workplace noise rather than the label number.
Is the DPG660 a standalone over-the-head muff or cap-mount?
It is a cap-mount muff. The expandable arms clip into the side accessory slots of a compatible slotted hard hat — there is no separate headband, so it cannot be worn on its own. If you need a standalone muff, choose an over-the-head model from our ear muffs collection.
Will the DPG660 fit my hard hat?
It is designed for hard hats with standard 30 mm side accessory slots. Confirm your helmet has compatible slotted accessory rails before ordering, since the cups depend on those slots for positioning and seal.
What does dielectric mean and why does it matter?
Dielectric means the earcups are non-conductive — they add no metal-to-head conductive path. That makes the DPG660 a sensible pick for electrical, lineman, and utility work near energized equipment, used alongside appropriate arc and voltage-rated PPE.
Is the DEWALT DPG660 electronic or passive?
It is a passive muff. It does not amplify quiet sounds or electronically compress loud impulses. If you want to hear conversation and warning sounds while suppressing gunshots or machinery bursts, look at electronic ear muffs instead.
Is NRR 25 enough for my job?
It depends on your noise level. Subtract the derated attenuation from your measured dBA exposure and compare it to the OSHA limit. Our guide on how to calculate the NRR you need walks through the math; for very high impact noise you may need dual protection.
Does the DPG660 meet OSHA hearing protection requirements?
Hearing protectors are part of an OSHA 29 CFR 1910.95 hearing conservation program when exposures reach the action level. The muff provides attenuation, but compliance also requires noise monitoring, fit, and training — review our OSHA 1910.95 overview for the full picture.
Can I wear the DPG660 with the cups up between tasks?
Yes. The expandable swing-down arms let you rotate the cups up out of the wear position when you step into a quiet area and swing them back down to seal when you re-enter noise, without removing your hard hat.
What color is the DPG660 and is it high-visibility?
It has a yellow shell with black earcups, which keeps it easy to spot on a busy site. Color does not affect the NRR 25 rating.
How does the DPG660 compare to over-the-head DEWALT or 3M muffs?
The DPG660 trades the standalone headband for hard-hat integration. If you do not wear a hard hat, an over-the-head muff is more practical; if you wear a helmet all shift, the cap-mount design avoids juggling two pieces of gear. See our ear muffs collection to compare form factors.
Should I use muffs or ear plugs for this work?
Muffs are faster to don and remove over a hard hat, while plugs can give higher attenuation in tight or hot conditions. For high-noise tasks you can combine both. Our ear plugs vs ear muffs guide explains how the ratings stack.
Where can I buy the DEWALT DPG660 and see the current price?
Use the buy button on this page to check live availability and pricing through our Amazon affiliate link. As an Amazon Associate, WC Safety earns from qualifying purchases at no extra cost to you. Browse related hearing protection if you want to compare options first.
Written by Steven Eaton, WC Safety Editorial. Specifications sourced from DEWALT 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
DEWALT
Model / SKU
DPG660-D
Product Type
Earmuffs
Price
$17.99 (Amazon)
Rating
3.71 / 5 — 7 reviews
Availability
Check current availability on Amazon
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Verified Buyer Reviews
Customer Reviews
★★★★☆4.3 / 5· 62 ratings on Amazon
★★★★★
Cover Ears Comfortably
Once you have figured out the attachment points for these are the slots at the bottom rear of the DPG22V helmet, you are set. These cover my ears completely and comfortably.
Verified Purchaser · February 1 · ✓ Amazon Verified Purchase
★★★★☆
Repackaged but otherwise great item.
Was certain I was receiving a new product, but it was used and the package was damaged. It was repackaged and taped back up though so no big deal. It fit well into the hardhat with a little patience.. I am thinking it was returned because it looked like it wouldn't fit into the slot of the hard hat, but with a few tries, it fell right into place. I am not docking it because it was a return. It otherwise looked like a new product. I was buying it for someone else so it would have been nice to have looked new instead of repackaged and taped up. I am happy with the purchase though and they work well.
Verified Purchaser · June 25, 2 · ✓ Amazon Verified Purchase
★★★★★
Hard Hat ear muffs
Great product comfortable on your ears
Verified Purchaser · March 18, · ✓ Amazon Verified Purchase
★★★★★
Great Buy…👍🏽👍🏽
Great Buy…👍🏽👍🏽
Verified Purchaser · March 8, 2 · ✓ Amazon Verified Purchase
★☆☆☆☆
Dont work with full brim hard hats as stated
Garage dont fit my full brim hardhat at all 123 Close out is awful at Shipping dates or getting your order done at all highly do not recommend DO NOT BUY FROM THIS 123 CLOSEOUT SHOP
Verified Purchaser · December 1 · ✓ Amazon Verified Purchase
★★★★☆
Well see
Haven’t tested but look durable
Verified Purchaser · April 19, · ✓ Amazon Verified Purchase
★★☆☆☆
Good noise reduction
Not as durable but comfortable good noise canceling but the earmuffs fall off constantly.
Verified Purchaser · November 2 · ✓ Amazon Verified Purchase
Showing 7 of 62 Amazon reviews.
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