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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


Comfortable, excellent, really do work.
I accidently lost the filter plug and they still work!

Reviewed by Travis (Posted on 12/24/13)

Solid Product

Comfortable, simple, effective, and a clean design. The best ear protection I've ever used.

Reviewed by Josh H. (Posted on 12/6/13)

Good protection

I gave these as a gift to a motorcycle rider, and if the plugs didn't stand out so far from the ear then they would be perfect. Also we may try the foam ear plug instead of the rubber flanged plug.

Reviewed by Jess R (Posted on 11/18/13)

pretty good, but....

as the title says, these were pretty good, but this style isnt the best for me. They work great, if i can get one to fully seal inside my right ear. The left side fits in perfectly and cuts the noise down at my job greatly from people using loud airguns, air and regular hammers, air blasters and the sound of loud vehicles in the shop.

These can be easily forgotten in your ear, so be careful about answering the phone with them in and using your shoulder to hold the phone, but you are easily able to hear who is on the other line.

I have recommended surefire's earplugs to the others at work. Three are considering it and are waiting for my review once I get the right kind in.

Reviewed by corbin (Posted on 11/13/13)

warehouse worker

excellent in blocking out the loud/harsh noises. a little difficult to get inserted into place.

Reviewed by Rodney (Posted on 11/11/13)


Working in bars/clubs, I've been very happy with the EP3s. I first ordered a medium, but ended up ordering another set but small. They fit better but it would be perfect if there was a size in between med-small. I can hear the radio more clearly, and still be able to talk to customers with both ear buds in. Best so far!

Reviewed by Night Life Security (Posted on 11/9/13)


Excellent tool. Sizing is very difficult. I ordered a medium, to find out the ear canal piece should be a bit bigger, but the outside portion is correctly sized for me.

Reviewed by K. Clay (Posted on 11/7/13)

Love them

These are great to wear all day long in the ambulance cab or during rescue situations. Will be buying more!

Reviewed by Paramedic (Posted on 11/6/13)

Dental hygienist

Working in this field with high frequencies the EP3 Sonic Defenders help reduce the sound and I still have the ability to communicate with my patient.

Reviewed by Liz (Posted on 10/26/13)


I have tried many hearing protectors for shotgun sports, and have found these to be the best yet !!

Reviewed by michael rickenbacher (Posted on 10/23/13)