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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
EP3-OR-LPR 084871318839

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

EP3 Sonic Defenders

Not good enough for stand alone protection.

Reviewed by Effie (Posted on 10/19/13)

SureFire Sonic Defenders

Uncomfortable, and no better than foam plugs for me. Tried to use them, but went back to the ear covering "muffs".

Reviewed by Rifle Shooter (Posted on 10/17/13)

Blocking sound

By far the best option when it comes to comfort as well as blocking out sound while shooting indoors and outdoors.

Reviewed by Tj (Posted on 10/17/13)

great ear plugs

Very nice ear plugs. Very comfortable and easy to wear. Offer get protection also. Highly recommend

Reviewed by justin (Posted on 10/16/13)


I guess i must have been using them wrong, I didn't think they worked better than foam plugs. I couldn't get them in deep enough to block the sound, and I had a hard time keeping them in. The picture shows them as big, but in reality they were small for me to hold on to. Maybe I'm missing something but they didn't work for me. I stopped using them because 1 fell out and I didn't know till I went to remove them. So I tried it with the 1 and a foam one in the other ear. The foam was better.

Reviewed by djnott (Posted on 10/16/13)

Not Bad

I find they are a little uncomfortable in my ears but they work great.

Reviewed by Me (Posted on 10/16/13)

Ringing in the ears...

Don't expect these to block out all of the sound. If you are shooting at a poorly designed range with concrete shooting stalls and lots of steel beams you'd need something more. I recently experienced temporary loss of hearing while shooting 10 rounds of 12G 00Buckshot. I've also had some ringing in my ears since then.

I've been to countless machinegun ranges and small arms ranges using generic foam ear plugs. This has never happened using foam. I'm going back to the basics.

Reviewed by Brandon (Posted on 10/16/13)


Great earplugs.

Reviewed by Doug (Posted on 10/15/13)


Ordered these earplugs on a whim. Looked good and had some good reviews. I am VERY glad I ordered them and I am VERY happy with them. They work like a charm and do not give me 'ear fatigue.' I was having issues with some other ear protection plugs. Let's just say they are not my hero in terms of hearing protection. SUREFIRE nailed and I am happy to report no ear fatigue.


Reviewed by Kevnn4 (Posted on 10/14/13)

handy ear plugs

I truelly love these ear plugs. They are easy to put in, not annoying once in, come in a handy carry case, and block out noise very well. I use them at the race track ( 24 hour rolex at daytona) and take them to all concerts with me. You can still hear well, it just blocks the noise. I have several pairs so I am never without them when I need them. I highly recommend them to everyone.

Reviewed by jill (Posted on 10/13/13)