The E-A-R™ Classic™ SuperFit™ 33 orange “fitting ring" provides a guideline for proper insertion and quick visual compliance check.
Another innovation from 3M, E-A-R™ Classic™ SuperFit™ 33 has a built-in visual check - the orange fitting ring. If the ring is visible after insertion, refitting is recommended for the best hearing protection. - Reusable Pillow Pack helps keeps earplugs clean when they are not being worn. - Conforms to the shape of the ear canal to help create a comfortable, snug noise barrier - Slow-recovery earplug foam is flame-resistant and moisture-resistant - Noise Reduction Rating (NRR)*: 33 dB. CSA Class AL. - Test compatible with 3M™ E-A-Rfit™ Validation System.
*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. 3M is Leading the Advancement of Hearing Conservation™.