Moldex® BattlePlugs Are An Authorized Hearing Protector For Use By Soldiers And Department Of The Army Civilians. Patented BattlePlugs use a unique filter built into the plug body to instantaneously reduce dangerous, sudden impulse noises (e.g. weapons fire) plus allow for easy communication and improved awareness in the cap open position. FEATURES: (1) Now an authorized hearing protector for use by soldiers and Department of the Army civilians (2) Dual Mode Protection: Open cap to hear commands and for loud blasts: NRR 9dB. Closed cap for continuous/steady noise and impulse noise protection: NRR 24dB. (3) The louder the blast, the more noise reduction (in open position). (4) Cap is easy to open and close, in-ear. (5) Easy to see when cap is in open or closed mode. (6) Easy to clean. Wash & Wear Aagin! BattlePlugs can be washed and reused. Each pair comes with a Pocket-Pak® carrying case to keep them clean when not in use. The smooth shape slides easily into your pocket. No sharp edges. (7) Complete System: Each bag contains a pair of BattlePlugs and a cord, Pocket-Pak carrying case, chain, and instructions.