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 3M2091, 3M PARTICULATE FILTER, P100 H6B/V , Optime™ 95 Behind-the-Head Earmuffs H6B/V LL-1LASER LIGHT EAR PLUGS 3M3939 Heavy Duty Duct Tape