SUREFIRE: Sonic Defenders Plus EP4

Listen to your ears. Protect your hearing without losing touch with your surroundings. The SureFire EP4 Sonic Defenders® Plus provide superior hearing protection against harmful noise while allowing safe levels of sound to pass through, so you can maintain awareness and communicate clearly in noisy environments.

Featuring a patented triple-flanged stem, the EP4s deliver a Noise Reduction Rating (NRR) of 24 dB. The integrated noise-reducing filter blocks potentially harmful noise above 85 dB while letting ambient sounds and conversations remain audible. For additional protection, the attached filter caps can be inserted to block out lower-level noise, such as in aircraft or during extended exposure.

Constructed from soft, durable, hypoallergenic polymer, the EP4s ensure all-day comfort, long-term durability, and extended usability — up to 6+ months with proper care.

Key Features

• 24 dB Noise Reduction Rating (NRR) – Protects against harmful noise while maintaining situational awareness.

• Patented Triple-Flanged Stem – Ensures a secure, comfortable seal and superior fit.

• Noise-Reducing Filter – Allows safe sounds to pass while reducing potentially damaging noise levels.

• Attached Filter Caps – Insert caps for additional protection in quieter environments.

• Soft, Hypoallergenic Polymer – Provides lasting comfort and durability for extended wear.

• Long Service Life – Reusable for up to 6+ months with proper care.

Declaration of Conformity:
https://www.surefire.com/doc-ep4

SureFire EP4 Sonic Defenders® Plus — Hear what matters. Protect what’s vital.