The 3M™ 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 available or accesible for re-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