Peltor Helmet Ear Muff H520P3 Optime II developed for noise-hazard environments and muffles even extremely low frequencies.

The sealing rings are filled with a unique combination of liquid and foam giving an optimum seal with low contact pressure providing snug comfort even during long-time use. Only for use with the Petzl Vertex Helmets.

- Slot attachment with quick mounting without tools
- Working, airing or park positions
- Attachment for visor and rain

Note: They clip very easily into place but are a bit of a struggle to get off.

Noise reduction: 30 dB