3M PELTOR Optime 105 Earmuffs are a high performance hearing protector. Featuring a proprietary dual-cup design and soft, foam-filled cushions, these earmuffs provide high attenuation and outstanding comfort. Additionally, these earmuffs are available in a variety of attachment types, including over-the-head, hard hat, and behind the head.The double-shell technology incorporated in 3M PELTOR Optime 105 Earmuffs are designed to boost its noise blocking ability. Thanks to this feature, these earmuffs have a Noise Reduction Rating (NRR) between 27–30 dB* (depending on the attachment type), making them an ideal choice for use in airports; construction; manufacturing; food, beverage, & agriculture; oil & gas; heavy manufacturing; pharmaceutical; and transportation.