Earplugs Effectively Protect Hearing Ensure Sleep QualityDescriptionsEarplugs for sleeping are made to be as comfortable as possible while blocking external sounds that may prevent or disrupt sleep.Earplugs are available which help to protect ears from the pain caused by airplane cabin pressure changes.easy to use.Noise Reduction Rating (NRR)*: 29 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.
