The Over-the-Head style Model 9AN/2 offers superior noise reduction, durability and long-term wearing comfort for any high-noise environment. This Military-Grade hearing protector is manufactured to mil spec SAE-AS23899 specifications. The deeper dome design provides greater noise-attenuation in lower frequencies.Adjustable headset and stirrup assembly assures uniform headband pressure for a more comfortable, personalized fit Weather-resistant, soft foam head pad with breathable, ribbed design eliminates 'hot spots' and provides added comfortSoft, foam-filled ear seals are easily replaceableWork-ready, rugged design stands up to the most demanding work environmentsCertified Noise Reduction Rating (NRR): 27 dBCODE: 06504G-03