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Listen to Your Ears. Don't ignore your hearing health. SureFire EP4 Sonic Defender Plus offers protection against Noise-Induced Hearing Loss (NIHL), while still allowing you to hear routine sounds and conversations in noisy environments. The triple-flanged-stem provides a Noise Reduction Rating (NRR) of 24 dB. The proprietary noise-reducing filter reduces potentially harmful noises (above 85 dB) while letting safe sound levels into the ear canal. In addition, EP4s include attached filter caps that can be inserted for extra protection, blocking lower-level noise like that found on airplanes where hearing ambient sounds or conversations isn't critical. These Sonic Defenders are made from a soft, durable, hypoallergenic polymer that provides all-day comfort. They also have EarLock retention rings that utilize seven contact points to keep earpieces in place and fit consistently, while the soft, double-flanged stems provide a secure seal and comfort for extended periods. With proper usage and care, their life expectancy lasts up to 6+ months.

Key features include:

- Provides a 24-dB Noise Reduction Rating (NRR) with filter caps inserted
- Reduces potentially harmful noise levels above 85 dB
- Patented EarLock retention rings for a secure fit and consistent placement
- Soft, double-flanged stems for a comfortable seal all day long.