The soft, pliable foam on this corded foam earplug features an orange fitting ring that provides a guideline for proper fitting and visual compliance check. 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. *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.