3M Pistonz corded, push-to-fit earplugs are stylish hearing protection that feature soft foam tips with a metallic look and a convenient thumb-grip stem. No-roll foam makes fitting easy; simply push the earplug into the earcanal and twist to adjust the fit.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.