The E-A-R™ Classic™ SuperFit™ 30 orange “fitting ring" provides a guideline for proper fitting and quick visual compliance check.. Benefits Poly bag keeps each pair of earplugs clean before use. •Conforms to the shape of the earcanal to help create a comfortable, snug noise barrier •Slow-recovery earplug foam is flame-resistant and moisture-resistant •Noise Reduction Rating (NRR)*: 30 dB. CSA Class AL. •Test compatible with 3M™ E-A-Rfit™ Validation System