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Grey vinyl-cushioned earmuffs on black polyester headband, hard-hat mount

MSA

MSA 10034487 Hard Hat-Mounted Earmuffs 25 dB

SKU CH-64KX-KMTWF

Hard-hat-mounted earmuffs with a 25 dB noise reduction rating, dielectric construction and vinyl cushions for non-slotted full-brim hats

  • MaterialSteel
  • 25 dB noise reduction protects hearing in loud environments
  • Hard-hat mounted design fits non-slotted full brim models securely
  • Dielectric construction safe for electrical work settings
  • Vinyl cushions provide comfort during extended wear periods
  • Meets ANSI S3.19-1974 and CSA Class A standards

Hard Hat-Mounted Earmuffs 25 dB

These MSA earmuffs attach to non-slotted full brim hard hats to provide a Noise Reduction Rating of 25 dB. They are built for workers who need hearing protection that integrates directly with their existing head protection. The rigid cup design and vinyl cushions create a consistent seal around the ear. This model is identified by part number 10034487 and belongs to the Soprano series.

Sustained Use Behaviour

The dielectric construction uses a polyester band and steel components that meet ANSI S3.19-1974 and CSA Class A standards for reliable attenuation over full shifts. Vinyl cushions resist moisture and maintain their shape during extended wear in warm or humid conditions. The rigid cup structure prevents the seal from collapsing when the wearer leans against surfaces or moves repeatedly. A weight of .8 lb keeps neck fatigue low during long periods of continuous use.

Pre-Order Compatibility Check

Verify that your hard hat is a non-slotted full brim model compatible with manufacturer number 10003360 before ordering. Installation requires drilling into the helmet shell to mount the muff brackets securely. Drilling changes the helmet classification to ANSI/ISEA Z89.1 Class C, which removes electrical insulation ratings from the head protection. Ensure your workplace safety plan allows this modification and reclassification.

Highlights

  • 25 dB noise reduction protects hearing in loud environments
  • Hard-hat mounted design fits non-slotted full brim models securely
  • Dielectric construction safe for electrical work settings
  • Vinyl cushions provide comfort during extended wear periods
  • Meets ANSI S3.19-1974 and CSA Class A standards

Specifications

BrandMSA
Model10034487
MaterialSteel

Questions about this item

How much noise does the 25 dB rating on these muffs actually block during an all-day shift?

The Noise Reduction Rating is 25 dB, so the muffs are tested to reduce exposure by that amount when fitted correctly.

What helmet do I need to already own for the 10034487 muffs to attach?

They mount on non-slotted full-brim hats and require drilling into the helmet; the compatible manufacturer model is 10003360.

Will these dielectric cups stay compliant if I keep wearing my older Class C hard hat?

The muffs are dielectric and meet ANSI S3.19-1974 and CSA Class A; the ANSI/ISEA Z89.1 class rating of a drilled helmet is Class C.

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