Excellent over-the-ear protection in more hazardous high frequency regions. Features a soft cushioned headband with low headband force for comfort, self-aligning suspension, easy adjustment, and SuperSeal ear cushions for long term comfort. Noise Reduction Rating: 28 db. Meets ANSI Standard S3.19-1974.*Noise Reduction Rating. Earmuffs with a high NRR offer better noise protection in high frequencies.