Low-profile and lightweight earmuffs may be worn over-the-head, behind-the-head, or under-the-chin. Provides a protective seal without excess pressure while the pivoting ear-cup connections maintain the seal and proper alignment. Large ear-cup openings and soft, foam-filled cushions offer a snug, comfortable fit. Durable, lightweight construction of non-conductive, dielectric plastic. NRR 20 dB (CSA class B) when the band is worn over-the-head. NRR 22 dB (CSA Class A) when the band is worn under-the-chin. NRR 22 dB (CSA Class B) when band is worn behind-the-head. When worn in the over-head position NRR 20 dB/CSA Class B.