Universal plugs with patented filter technology. The unique impulse filters dampen bangs, hits etc. while letting through other sounds such as speech. Developed for military use where high demands are placed on correct sound reproduction and direction indication. Certified according to ANSI IPIL up to 166 dB. The filters dampen the sound level by 15 dB, so it is safe to stay 8 hours in noisy environments up to 100 dB. Best suited for shooting (including large caliber), construction industry, fireworks etc. CE-certified.