These durable, reusable vinyl corded earplugs are easy to use again and again, reducing waste. - Vinyl cord connects earplugs. - Triple-flanged, premolded design - Livewire stem fused with flanges looks cool, inserts easily and fits comfortably - Noise Reduction Rating (NRR)*: 26 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™.