The soft, uncorded foam earplugs from 3M that conforms to the unique shape of each ear for excellent hearing protection and comfort. · · · Smooth, dirt resistant surface provides better hygiene · · Earplugs are easy to roll down for quick and easy fitting · · Tapered design fits comfortably in ear canals · · Soft polyurethane foam is hypoallergenic · · Noise Reduction Rating (NRR): 29 dB, CSA Class AL · · 37 Decibel · · Available with cord, slow recovery foam · · CE Approved · · Discard after use · · C/w Fitting instructions