Designed with professional noise dampening foam, high sealing solid cup and the unique double-shell, built-in Omni-directional microphones increase environmental voices when the sound is over 82dB, providing enhanced communication for shooting, mowing, hunting, industry, manufacture, and other noisy conditions. Noise Reduction Rating (NRR): 22dB. Recessed microphones from our ear protection amplifies environmental sounds up to 1.2x-1.5x, providing enhanced listening and communication. Amplification automatically shuts off at 82dB. Our safety ear muffs featured a padded headband and super-soft ear cushions ensure the safety earmuff fits firmly and comfortably around your head without causing pressure, it can be flexibly adjusted to suit various sizes.