Surefire EarPro Defenders

Note: Size "MEDIUM" Fits (90%) Most People. Proper size is based on the dimensions of your ear's concha bowl. EP4 Sonic Defenders Plus SureFire EP4 Sonic Defender Plus will protect your hearing against Noise-Induced Hearing Loss (NIHL) without compromising your ability to hear routine sounds or conversations in noisy environments. Their triple-flanged-stem provides a Noise Reduction Rating (NRR) of 24 dB. Safe sound levels are allowed to pass through into the ear canal, while potentially harmful