These foam earplugs feature soft, slow-recovery foam for comfort and outstanding noise reduction. A red flame design adds fun to serious hearing protection. 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. Test compatible with 3M E-A-Rfit Validation System. CSA Class AL. Research suggests that many users will receive less noise reduction than indicated by the NRR due to variation in earplug fit, earplug fitting skill, and motivation of the user. It is recommended that the NRR be reduced by 50% to better estimate typical workplace protection. Corded/Cordless: Cordless; Shape: Tapered; Material(s): Polyurethane; Noise Reduction Rate (NRR): 33 dB.