---
product_id: 1547517
title: "SureFire EP4 Sonic Defenders Plus filtered Earplugs, triple flanged design, reusable, Black, Medium"
brand: "surefire"
price: "1217171₫"
currency: VND
in_stock: true
reviews_count: 8
category: "Sure Fire"
url: https://www.desertcart.vn/products/1547517-surefire-ep4-sonic-defenders-plus-filtered-earplugs-triple-flanged-design
store_origin: VN
region: Vietnam
---

# Low-profile triple-flanged design 24dB Noise Reduction Rating Patented EarLock retention rings SureFire EP4 Sonic Defenders Plus filtered Earplugs, triple flanged design, reusable, Black, Medium

**Brand:** surefire
**Price:** 1217171₫
**Availability:** ✅ In Stock

## Summary

> 🔊 Protect your ears without missing a beat — the smart earplug for the modern professional.

## Quick Answers

- **What is this?** SureFire EP4 Sonic Defenders Plus filtered Earplugs, triple flanged design, reusable, Black, Medium by surefire
- **How much does it cost?** 1217171₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/1547517-surefire-ep4-sonic-defenders-plus-filtered-earplugs-triple-flanged-design)

## Best For

- surefire enthusiasts

## Why This Product

- Trusted surefire brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Wearability:** Low-profile, triple-flanged stems fit comfortably under helmets, masks, and headsets for uninterrupted use.
- • **Lock-In Comfort All Day:** Patented EarLock rings with seven contact points ensure a secure, consistent fit without irritation.
- • **Versatile Noise Control:** Filter caps allow customizable protection—block out loud environments or stay aware when needed.
- • **Durable & Hypoallergenic:** Made in USA from medical-grade polymer designed for long-lasting, skin-friendly wear.
- • **Hear Clearly, Protect Fiercely:** 24dB NRR filters harmful noise while preserving conversations and ambient sounds.

## Overview

SureFire EP4 Sonic Defenders Plus are premium reusable earplugs featuring a 24dB Noise Reduction Rating with filter caps, patented EarLock retention rings for a secure fit, and a low-profile triple-flanged design for all-day comfort. Made from hypoallergenic, medical-grade polymer in the USA, they balance effective noise reduction with the ability to hear conversations and ambient sounds, ideal for professionals who demand both protection and awareness.

## Description

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.

Review: Great earplugs - So I bought these to use on my jet ski so the wind noise didn't destroy my ears thinking I could just pop the filter plug open and closed easy when needed. First off their super comfortable. For some reason I thought the "lock" or whatever it's called would be a hard rubber, but it's super soft and does a great job holding them in my ears. Even when I'm soaked from sweat and lake water. Easily the most comfortable plugs I've used, and they stayed locked in place the entire time I had them in. Unfortunately you need to take the whole plug out of your ear to easily open or close the filter. If you try to close the filter with them in your ear you're going to push the whole plug too deep and potentially hurt yourself, and while trying to open it with the plug in my ear I somehow managed to break the harness that holds them together. I also couldn't just leave the filter open while moving because they whistled like crazy. Only other minor complaint is that they're a little awkward to get in. The actual plug curves up compared to the locks, which probably helps with the comfort, but took me a bit to figure out and actually get into my ear canal. Overall I'm really happy with them, they worked okay on the jet ski. Cut out all of the wind noise but when we stopped to talk I had to pull one out to hear which was not ideal because they're a little weird to get back in. I'll be moving these over to my shooting ear pro where I know I'll love them because that's they're actual intended purpose.
Review: Very comfortable! - I got the medium and now that I've had them for a while, it makes me wonder if ear canals can be different sizes like feet can be, or if I need the small size after all--my right ear seems to work loose a little easier, but not my left. Pushing them back in solves in the problem. Maybe I just have difficult ears. I have the same problem with earbuds. That being said, these are super comfortable! I haven't had to wear them all day, but they're good for a couple of hours and I felt at the time that I could go even longer without a problem. They're a bit tricky to put in the first couple of times, but I like the secure feeling the design gives and I've never had them fall out, like I have with the traditional foam ones. The lanyard provided is a bit difficult to attach, since the lanyard tips are these little balls you have to push through tiny little holes in the earplug, so once it was attached, I've never taken the lanyard off again. It makes it easier to keep track of the things, but maybe for someone else, that would be annoying to remove and reattach regularly. I just keep them in the case and everything is fine. I've used them around circular saws, vacuums, and lawnmowers and they work great for blocking out so much of the noise! Can't comment on how well they do with really loud, constant noise, like engines or shooting or very, very loud equipment, but at least around the average household/office noises, they work very well. I always leave the valves in, so everything is muffled and I'm okay with that because I'm used to it with other forms of ear protection. They seem to do a better job of filtering out the really loud noises than some ear plugs I've had, while still preserving normal voice levels, if that makes sense--maybe that's not how it's supposed to work, but it works great for me! I'm looking at getting a second set for my tool kit, since this set lives in my purse and has saved my ears unexpectedly on more than one occasion.

## Features

- 24dB Noise Reduction Rating (NRR) with filter caps inserted, Hear safe sound levels (with filter caps out) as if you weren't wearing ear plugs
- Soft, adjustable, triple-flanged stems provide secure seals in ear canals and all-day comfort
- Low-profile design allows you to keep them in place while wearing a mask, helmet, hat, or while using supplemental hearing muffs
- Patented EarLock retention rings utilize seven contact points to lock earpieces in place and fit the same way every time
- Made in USA from hypoallergenic, medical-grade polymer that's soft, durable, and long-lasting

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B004DH65RI |
| Best Sellers Rank | #6,069 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Hunting & Shooting Earplugs |
| Customer Reviews | 4.2 4.2 out of 5 stars (6,426) |
| Date First Available  | November 23, 2010 |
| Department  | unisex-adult |
| Is Discontinued By Manufacturer  | No |
| Item model number  | EP4-BK-MPR |
| Manufacturer  | SureFire |
| Product Dimensions  | 4.25 x 1 x 5 inches; 1 ounces |

## Product Details

- **Brand:** SureFire
- **Color:** Black
- **Material:** Polymer
- **Recommended Uses For Product:** Noise Protection
- **Size:** 1 Count (Pack of 1)

## Images

![SureFire EP4 Sonic Defenders Plus filtered Earplugs, triple flanged design, reusable, Black, Medium - Image 1](https://m.media-amazon.com/images/I/61ws1+5qpaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great earplugs
*by B***B on June 4, 2022*

So I bought these to use on my jet ski so the wind noise didn't destroy my ears thinking I could just pop the filter plug open and closed easy when needed. First off their super comfortable. For some reason I thought the "lock" or whatever it's called would be a hard rubber, but it's super soft and does a great job holding them in my ears. Even when I'm soaked from sweat and lake water. Easily the most comfortable plugs I've used, and they stayed locked in place the entire time I had them in. Unfortunately you need to take the whole plug out of your ear to easily open or close the filter. If you try to close the filter with them in your ear you're going to push the whole plug too deep and potentially hurt yourself, and while trying to open it with the plug in my ear I somehow managed to break the harness that holds them together. I also couldn't just leave the filter open while moving because they whistled like crazy. Only other minor complaint is that they're a little awkward to get in. The actual plug curves up compared to the locks, which probably helps with the comfort, but took me a bit to figure out and actually get into my ear canal. Overall I'm really happy with them, they worked okay on the jet ski. Cut out all of the wind noise but when we stopped to talk I had to pull one out to hear which was not ideal because they're a little weird to get back in. I'll be moving these over to my shooting ear pro where I know I'll love them because that's they're actual intended purpose.

### ⭐⭐⭐⭐⭐ Very comfortable!
*by E***Y on January 20, 2020*

I got the medium and now that I've had them for a while, it makes me wonder if ear canals can be different sizes like feet can be, or if I need the small size after all--my right ear seems to work loose a little easier, but not my left. Pushing them back in solves in the problem. Maybe I just have difficult ears. I have the same problem with earbuds. That being said, these are super comfortable! I haven't had to wear them all day, but they're good for a couple of hours and I felt at the time that I could go even longer without a problem. They're a bit tricky to put in the first couple of times, but I like the secure feeling the design gives and I've never had them fall out, like I have with the traditional foam ones. The lanyard provided is a bit difficult to attach, since the lanyard tips are these little balls you have to push through tiny little holes in the earplug, so once it was attached, I've never taken the lanyard off again. It makes it easier to keep track of the things, but maybe for someone else, that would be annoying to remove and reattach regularly. I just keep them in the case and everything is fine. I've used them around circular saws, vacuums, and lawnmowers and they work great for blocking out so much of the noise! Can't comment on how well they do with really loud, constant noise, like engines or shooting or very, very loud equipment, but at least around the average household/office noises, they work very well. I always leave the valves in, so everything is muffled and I'm okay with that because I'm used to it with other forms of ear protection. They seem to do a better job of filtering out the really loud noises than some ear plugs I've had, while still preserving normal voice levels, if that makes sense--maybe that's not how it's supposed to work, but it works great for me! I'm looking at getting a second set for my tool kit, since this set lives in my purse and has saved my ears unexpectedly on more than one occasion.

### ⭐⭐⭐⭐ Good product...comfortable, does reduce louder noises with passive reduction, durable, but not best match for all applications
*by Z***S on August 16, 2014*

I have been using the Sonic Defenders since the first generation. Since my first pair, these have improved consistently. Overall, I like the product. The primary design of this Ear Pro line is to reduce all noise, and reduce overly loud noises more so than ones of normal volume. It uses a passive design in which a valve on the ear plugs closes (from the sound wave) when higher volume noises or made, but is not closed by low volume things such as voices. To run these as a conventional ear plug, they come with valves you can close so that all noise is reduced. The two things most people seem more curious about is how well this product works, and how comfortable it is. My personal assessment is as follows... -effectiveness-the passive noise reduction does work, but may not work well enough for all users. For example, it reduces the sound of indoor gunfire to a point in which it is still a very unpleasant experience, but manages to reduce the sound enough to reduce the chance of hearing damage. This same situation outside (which will not be as loud) is a different story...these reduce the sound acceptably. So for inside usage, closing the valves may be necessary. -comfort-these are much more comfortable than easier generations. Still, application is key. Adjusting how deep the plug sits in the ear canal, as well as how well the frame rests in the ear, as well as that you have the right size, is absolutely critical to effective function and comfort. Once the above are given attention to, they are comfortable for prolonged wear of numerous hours. Cleaning these is a step that should not be ignored (otherwise, you could get an ear infection). I generally use alcohol to disinfect them, and break down any wax buildup. When used daily, I think these work work for at least a year when properly cleaned. If not properly cleaned, I think they tend to die earlier. So these are not magic, but I think a good product nonetheless. The passive noise reduction can be useful for many people, but it does have some limitations that may not make it the best choice for others.

## Frequently Bought Together

- SureFire EP4 Sonic Defenders Plus filtered Earplugs, triple flanged design, reusable, Black, Medium
- Walker's Razor Slim Ultra Low Profile Compact Design Adjustable Range Shooting Hunting Hearing Protection Electronic Earmuffs
- SureFire EP7 Sonic Defenders Ultra filtered Earplugs w/ Comply Canal Tips, reusable

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.vn/products/1547517-surefire-ep4-sonic-defenders-plus-filtered-earplugs-triple-flanged-design](https://www.desertcart.vn/products/1547517-surefire-ep4-sonic-defenders-plus-filtered-earplugs-triple-flanged-design)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-10*