• Excellent attenuation in all three wearing positions: over-the-head, under-the-chin, and behind-the-neck.
• Pivoting, hinged band provides adjustable positions for a more comfortable fit and seal.
• Noise Reduction Rating (NRR)* 25 dB (in all three positions).CSA Class AL

*The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.