3M™ E-A-Rsoft™ SuperFit™ 33 earplugs seal the earcanal with soft, slow-recovery foam for excellent noise reduction and comfort. Orange fitting ring provides a guideline for proper fitting and visual compliance check. The soft, pliable foam on this uncorded foam earplug features an orange fitting ring that provides a guideline for proper fitting. Earplugs are easy to roll down and insert, then expand within the earcanal for a comfortable, secure fit. Poly bag keeps each pair of earplugs clean before use. Regular size fits most earcanals. 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™.