3M Foam Earplugs 1100, Uncorded, NRR 29 dB

3M Foam Earplugs 1100, Uncorded, Noise Reduction Rating (NRR) 29 decibels (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), CSA class AL. 3M 1100 uncorded foam earplugs feature soft, hypoallergenic polyurethane foam, a smooth, dirt-resistant surface for better hygiene and a tapered design to fit comfortably in a wide range of earcanal sizes.