The Peltor Ultimate 10 NRR 30 dB Earmuff in Blue provides one of the highest protection levels in the industry, so you'll barely hear a thing. With excellent attenuation, these Headphones operate at a Noise Reduction Rating of only 30 decibels, which is the lowest possible level. The dual-wall design is what allows for this maximum attenuation. Also, the Peltor Ultimate 10 Earmuff can handle maximum high and low frequency attenuation. These Peltor Earmuffs are designed for use with large caliber or magnum rounds. With pivoting cups and a padded headband, move around with ease. These Blue NRR Ear Muffs, 30 dB, provide maximum comfort and top-level performance.