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EP3 Sonic Defenders®

Filtered Flanged Earplugs

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Noise Reduction Rating 24dB (with filter caps inserted)
Color Black, Clear, Orange
Size S, M, L
Filter Yes
Stem Double Flanged
Radio Comm Compatible Yes
Included Lanyards Detachable
Features -


EP3-BK-LPR 084871315173
EP3-BK-MPR 084871315166
EP3-BK-MPR-BULK 084871315517
EP3-BK-SPR 084871315159
EP3-LPR 084871250610
EP3-LPR-BULK 084871250634
EP3-MPR 084871250603
EP3-MPR-BULK 084871250627
EP3-SPR 084871250641
EP3-SPR-BULK 084871310048
EP4-BK-LPR 084871315203
EP3-OR-SPR 084871318815

For detailed specifications and sizing chart, click here.

EP3 Sonic Defenders protect your hearing without interfering with your ability to hear routine sounds or conversations. Their double-flanged-stem design fits most people and provides a Noise Reduction Rating (NRR) of 24dB. Sounds, at safe levels, are allowed to pass through into the ear canal, while potentially harmful noises (above 85dB) are reduced via a proprietary design that incorporates a special noise-reducing filter. EP3s include attached filter caps, which can be inserted for additional protection and blocking out lower-level noise, like that heard on a plane, where hearing ambient sounds or conversations isn't critical. Right/left color-coded Sonic Defenders are made from a soft but durable, hypoallergenic polymer that provides all-day comfort and an extended product life (up to 6+ months, depending on usage and care). Their patented EarLock® retention rings lock the earplugs in place, while soft, adjustable double-flanged stems provide secure seals in the ear canals. A low-profile design means EP3s can be worn while wearing a helmet or mask, or while using a phone or headset. Available in clear, black, or orange.

Comfortable EP3 Sonic Defenders also serve as earpieces for SureFire Hearing Protection and other compatible radio communication systems* simply by removing the noise-reducing filter and attaching the earpiece to the system. NOTE: EP3 earpiece will not provide hearing protection if the noise-reducing filter is removed.

EP3s are available in small (S), medium (M), and large (L). Proper size is based on the dimensions of your ear's concha bowl. Size "medium" fits most people; however, to ensure the best possible fit, click on the Sizing Chart thumbnail image above or download detailed specifications here to also view the sizing chart on page 4. For those with larger (in diameter) ear canals, the three-flange stem of our EP4 Sonic Defenders may provide a better fit than the EP3's two-flange stem.

EP3 Sonic Defenders are sold as a single left/right set or in a box containing 25 sets. Each set is packaged in a convenient carry case and includes a polymer lanyard.

Thales: Covert Security Harness; Harris: Security Force Communication Set;

Motorola: Surveillance Kits; Tactical Command Industries: Tactical Earpiece Products; Peltor: Lightweight Systems-Hearplug;
Silynx: C4Ops Headset

[NSN: 6515-01-549-6448, 6515-01-549-6453, 6515-01-549-6457]
  • 24dB Noise Reduction Rating (NRR) with filter caps inserted
  • Lowers potentially dangerous noise levels above 85dB
  • Hear safe sound levels (with filter caps out) as if you weren't wearing ear plugs
  • Patented EarLock® retention rings utilize seven contact points to lock earpieces in place and fit the same way every time; soft, double-flanged stems provide secure seals and all-day comfort
  • Made from hypoallergenic, medical-grade polymer that's soft, durable, and long-lasting
  • Low-profile design allows you to keep them in place while wearing a mask, helmet, hat, or while using phone, headphones, or supplemental hearing muffs
  • Serve as earpieces for compatible* radio communication systems
  • Available in clear, black, or orange
  • 26" polymer lanyard included

Related Information

Parts and Accessories


These are the best hearing protection on the market! I'm able to hear other people talking, and other small noises. But when I start shooting they deaden the noise. I have not had any problems or complaints while using these. A great product.

Reviewed by Noah (Posted on 10/12/13)

Great Plugs

Bought these on a recommendation from a friend and couldn't be happier. Best non-electronic hearing protection you can buy.

Reviewed by Tyler E (Posted on 10/12/13)

Sound off if you got a pair.

These plugs are excellent - they are comfortable, easy to put in and remove, and provide great noise reduction while allowing conversations with relative ease (I've only tested at outdoor ranges, so I don't know how they handle the extra reverberation indoors).

Reviewed by Rob D. (Posted on 10/11/13)

First Time Buyer

Great product at an affordable price. Very comfortable and works as advertised. When I need a replacement set I will definitely purchase from SureFire.

Reviewed by Don (Posted on 10/11/13)


just a great product ! give them a try .

Reviewed by jeff mosher / mosherunlimited (Posted on 10/11/13)

Made my Granddaughters day

Our 11 year old Granddaughter is very sensative to loud noises. She is also a big fan of Justin Bieber who just happened to have a concert scheduled in our city. My wife and I surprised her with tickets to the concert for her Birthday. Knowing we were going I bought your EP3 Sonic Defenders in advance .Our granddaughter was so nervous about the noise she wanted them in her ears before we entered the building. They worked to perfection. She was able to listen to the concert and enjoy the show without a single issue and said everything sounded great. We were able to enjoy a very special time with our Granddaughter. I cannot thank you enough.

Reviewed by Greg (Posted on 10/11/13)

Great product!

Awesome product! Loved them until I lost them :/ they fit great and allow you to hear little stuff but block oh the muzzle blast. Super comfortable! Need another pair!!!

Reviewed by Denton (Posted on 10/11/13)

Ep3 sonic defenders

I bought the sonic defender earplugs about a year ago and they are holding up I've been very satisfied with the performance and the comfortability of the sonic defenders. I go shooting twice a month and they are going strong. I like the fact that you all most don't even know there in your ear but yet you never have to worry about them coming lose or falling out. I give these a A++

Reviewed by Nathan nicholls (Posted on 10/11/13)

Ear protection

Product looks good, fits ok but doesn't give me the protection that plain foam plugs provide. More effort to put in than foam plugs. For me in the shotgun sports, only limited use.

Reviewed by Bill Johnson (Posted on 10/11/13)


These little guys are great. I will never stick another foam plug in my ear again. I have odd shaped ear canals that normal ear plugs tend to slip out of after a while, especially if it's hot and I start to sweat. The flanges hold these puppies in dead to rights and its nice being able to hear someone talk without pulling the ear buds out.

Reviewed by William (Posted on 10/11/13)