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Ear defenders with ABS cups. Pads filled with synthetic foam. Double plastic headband (POM), adjustable in height, with soft reinforcement for a better comfort.
Cup: ABS / Pads: Foam / Headband: POM.
EN352-1 Earing protection : Ear-muff
SNR 33 dB Standard noise reduction
H 33 High frequency attenuation
M 31 Medium frequency attenuation
L 25 Low frequency attenuation
ANSI S3.19-1974 American National Standards Institute
NRR 28 dB NRR (Noise Reduction Rating)
This standard specifies the test method for determining the level of noise attenuation (NRR Noise Reduction Rating) of the hearing protection, as recommended by the EPA (U.S. Environmental Protection Agency).