3M™ 1100 uncorded foam earplugs feature soft, hypoallergenic foam and a tapered design to fit comfortably in the earcanal. Benefits •Smooth, dirt resistant surface for hygiene •Comfortable for a wide range of earcanal sizes •Test compatible with 3M™ E-A-Rfit™ Validation System •Noise Reduction Rating (NRR)*: 29 dB. CSA Class AL