3M Peltor H10P3E Optime 105 Cap-Mount Earmuff — NRR 27 Yellow-203 which requires sealed goggles or

which requires sealed goggles or a face shield per your hazard assessment

A smoke-only alarm detects smoke

Over-the-head only - not a cap-mount design for hard hats

A standard cap-style hard hat does not include a chin strap

scarring and facial hair along the sealing surface all defeat a seal

3M Peltor H10P3E Optime 105 Cap-Mount Earmuff — NRR 27 Yellow-203 which requires sealed goggles orEDITORIAL REVIEW: 4. 6 5 WC Safety Review of the peltor h10p3e, the cap mount Optime 105 that brings 3M's flagship attenuation to slotted hard hats. Editorial assessment by Steven Eaton, WC Safety editor, based on published 3M specifications and category fit. We did not laboratory test this product. The 3M Peltor H10P3E exists because the loudest jobs are usually the ones that also require a hard hat. It's the cap mount version of the Optime 105 NRR