Product Details Smooth, dirt resistant surface provides better hygiene Earplugs are easy to roll down for quick and easy fitting Tapered design fits comfortably in earcanals Soft polyurethane foam is hypoallergenic Noise Reduction Rating (NRR) 29 dB, CSA Class AL Cord allows earplugs to be stored conveniently around the neck in between uses 3M 1110 corded foam earplugs feature soft, hypoallergenic foam and a tapered design to fit comfortably in the earcanal.  Equipped with a comfortable, cloth cord to help prevent earplug loss. Soft, corded foam earplugs that conform to the unique shape of each ear for excellent hearing protection and comfort.  Corded for convenience and to prevent loss of earplugs.  Smooth, dirt-resistant surface for hygiene - Comfortable for a wide range of earcanal sizes  Noise Reduction Rating (NRR)*: 29 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.  Recommended Industry:Automotive, Construction, General Manufacturing,Metal Fabrication, Military Maintenance,Repair and Operation (MRO), Mining,Oil & Gas, Pharmaceutical, Transportation