3M E-A-Rsoft Yellow Neon Blasts earplugs seal the earcanal with soft, slow-recovery foam for excellent noise reduction and comfort. Exciting flame graphics. 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.