Peltor COMBAT ARMS earplugs patented design permits wearers to hear low-level sounds critical to mission safety-conversation, footsteps, rifle bolts, approaching enemies. When needed, the plug's "filter" reacts to provide instant protection from high-level noises like weapons fire and explosions.
Dual-Ended Version
Sound travels into the opening at the middle of the earplug and down the sound channel in the yellow end of the earplug to the special filter. When the yellow end is inserted, the filter allows lower-level sounds to pass with limited interruption but high-level impulsive noises are restricted. The more intense the impulse, the more it is limited. When the green end is inserted, the earplug provides an NRR of 22 dB.

1 Bulk Pack includes 10 Pairs of Combat Arms double ended earplugs.