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. Refill container for One Touch™ dispenser. One gentle turn delivers uncorded foam earplugs. 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™.