3M™ E A R™ Pistonz™ corded earplugs soft foam tips conform to the unique shape of each earcanal to create a comfortable noise blocking seal. Since there is no need to roll these earplugs down before use, fitting is easy and the foam tips stay clean, even when your hands are dirty. Push to fit products provide in ear comfort and convenience, with the hearing protection you expect from 3M. Instant use No need to roll down. Stem is stiff enough for insertion, yet designed to flex sideways if impacted Metallic style earplug tips with ultra soft feel for all day wear Officially licensed hearing protection of NASCAR(R) Noise Reduction Rating (NRR)*: 29 dB. CSA Class 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™.