H7P3E 3M PELTOR OPTIME Description Description Cap-mounted design allows for easy use with most hard hats Liquid/foam filled ear cushions Noise Reduction Rating (NRRA): 24 dB. CSA Class A Related products 3M6000 SERIES FULL FACE RESPIRATOR 3M9211 AURA PARTICULTE DUST MASK N95 W/ EXHALATION VALVE – 10/BX QB2HYG – Honeywell Howard Leight Quiet® Polypropylene Foam Banded Earplugs NP102C – DYNA-FIT LITE EARPLUGS 100/BX