The Over-the-Head style Model 27 hearing protector combines comfort, durability and quality construction with superior low frequency noise attenuationAdjustable headset and stirrup assembly assures uniform headband pressure for a personalized fit and all day comfortWeather-resistant, soft foam head pad with breathable, ribbed design for eliminates 'hot spots' provides added comfortSoft, foam-filled ear seals are easily replaceableEar cups made of high-impact ABS with patented rib construction for added toughnessWork-ready, rugged design stands up to the most demanding work environmentsCertified Noise Reduction Rating (NRR): 22 dBCODE: 18220G-05