No rolling or sizing needed to get a comfortable, protective fit.
Soft polymer is washable and reusable.
Noise Reduction Rating (NRR)*: 25 dB. 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. 3M is Leading the Advancement of Hearing Conservation™.