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EP4 Sonic Defenders® Plus

Filtered Flanged Earplugs

EP4 Sonic Defenders Plus hearing protection -- Black

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


EP4-BK-LPR-BULK 084871314985
EP4-BK-MPR 084871315197
EP4-BK-MPR-BULK 084871314978
EP4-BK-SPR 084871315180
EP4-BK-SPR-BULK 084871314961
EP4-LPR 084871311434
EP4-LPR-BULK 084871311519
EP4-MPR 084871311526
EP4-MPR-BULK 084871311533
EP4-SPR 084871315128
EP4-SPR-BULK 084871314992
EP4-BK-LPR 084871315203
EP4-OR-MPR 084871318884

For detailed specifications, click here.

EP4 Sonic Defenders® Plus protect your hearing without interfering with your ability to hear routine sounds or conversations. Their triple-flanged stem design fits larger ear canals 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. EP4s 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 Plus 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 triple-flanged stems provide secure seals in the ear canals. A low-profile design means EP4s can be worn while wearing a helmet or mask, or while using a phone or headset. Available in clear, black, or orange.

Comfortable EP4 Sonic Defenders Plus also serve as earpieces for compatible radio communication systems* simply by removing the noise-reducing filter and attaching the earpiece to the system. NOTE: EP4 earpiece no longer provides hearing protection once the noise-reducing filter has been removed.

EP4s 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. For those with smaller (in diameter) ear canals, the two-flange stem of our EP3 Sonic Defenders may provide a better fit than the EP4's three-flange stem.

For best fit, click on the small Sizing Chart image at left.

EP4 Sonic Defenders Plus 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.

  * RADIO COMM SYSTEM COMPATIBILITY: 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

  • 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, triple-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

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Great product wrong size

This is a great product but the recommended size is to small for my big ears.

Reviewed by Josh (Posted on 3/27/15)

Fit and Finish
Product Design
Product Performance
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great ear plugs

There are times when you need the serious, external ear protector type of hearing protection, but these are the next best protectors. The foam type ear plugs are very quiet, but they get dirty after they've been in and out a few times. If your hands are really dirty, the foam ones could become hazardous, even on the first use.

The Surefire plugs go in and out easily but I've never had one come loose if properly installed. There is a little, plug-able hole on most variants if you need to reduce the reduction of sound for communication or whatever. These rival a good foam earplug for quietness but don't have the drawback of tricky installation and possible contamination of the ear canal.

Reviewed by rnfrank (Posted on 3/19/15)

They work!

I was a bit reluctant to try these as my ears and ear canals seem to be a bit odd. Things like Apple ear buds just fall right out and never worked for me. Regardless, I thought I'd give them a try. So far, I'm impressed. They're easy to put in, lock into place as advertised, and knock down the high decibel sounds well without making me feel like I've had concrete poured into my ears.

Reviewed by Ken A (Posted on 1/7/15)

Very good noise protection

I wore these to the range an put about 500 through my .45ACP and had no problem with deadening the sound. I have yet to use them with my 454 I may use the surefire plugs plus my muffs for that but overall they are a very good inexpensive earplug. When you unplug them you can hear a little bit better while talking to people at the range without having your ears blown out by other people shooting.

Only issue I have is that my right ear plug tends to get a little loose on me after going through a couple clips at the range and I have to press the plug in again. Other than this there awsome.

Reviewed by Chris K (Posted on 12/2/14)

Great... but not for 12 hours a day

I purchased these because I shift work in a manufacturing plant that requires ear protection. They worked great and they were as advertised.
I was a little disappointed because I needed to wear them for 12 hours a day and it would seem that after a week of wearing them my ears became very tender inside. I ended up switching back to the soft disposable types.
Although they are great for short periods of time I wouldn’t recommend to wear them 12 hours a day 5 days a week.

Reviewed by Michael (Posted on 11/28/14)


They work as advertised. I shoot and fly planes regularly, but I mainly got these for dancing, as I was hoping that they'd bring the music level down to a comfortable volume while still allowing me to hear conversations. They work rather well for this. The biggest problem I have is that because things are at a comfortable volume for me, I forget to speak up and no one else can hear me!

Reviewed by Kyle P (Posted on 11/10/14)


I just used this great hearing protection at the Formula One Race in Austin Texas. I sat on the first row in the MG and they worked as advertised!!!! Thank you.

Reviewed by Tony F (Posted on 11/1/14)

Perfect Fit

My son does competitive shotgun shooting so adequate ear protection is a requirement for both the athletes and the spectators. I lost my first pair of these on a hunting trip and reordered 2 pairs for both my son and myself. Unlike most ear protection I have tried which is either too bulky or begins to hurt my ears after a period of time, these fit perfectly and are extremely comfortable. It is also very easy to adjust the level of noise suppression depending on how firmly they are inserted. Highly recommended.

Reviewed by Steve E (Posted on 10/24/14)

Great for work

I work around nine extremely loud giant machines which run 24/7, so hearing protection is a requirement. The foam ear plugs always fall out of my ears and I'm always stopping to put them back in. I bought these and it has made a giant difference. They go in easily and are amazing at keeping the loud noises out but I can still hear my co-workers around me.

Reviewed by Heidi Alldridge (Posted on 10/15/14)

Great earplugs

After retiring from the military I took a job in a high noise industry. I needed a good set of hearing protection plugs so I tried these. They truly provide excellent hearing protection, fit well and stay exactly where they are supposed to throughout the day. I recently ordered a second pair in the event I ever lose or misplace this pait

Reviewed by Donnie (Posted on 10/14/14)