These durable, reusable cloth corded earplugs are easy to use again and again, reducing waste. Cloth 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™.