Grab the attention of your young workers with these 3M radically designed push-to-fit corded foam earplugs, and help boost hearing protection and compliance at the same time. Tough look of threaded metal, but feel of soft foam. Push-to-fit style means no earplug roll down required. Foam tips stay clean, even when your hands are dirty. Noise Reduction Rating (NRR]* of 30 dB CSA Class AL. New, softer foam. Improved NRR of 32 dB. *The NRR may over-estimate 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 .