These uncorded foam earplugs feature soft, slow recovery foam for comfort and outstanding noise reduction and exciting flame graphics. Soft foam 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™.