MSA Part #10034487
- For use with MSA non-slotted full brim hats.
- Requires drilling into the helmet to mount the muffs.
- The ANSI/ISEA Z89.1 class rating of a drilled helmet is Class C.
The Soprano Muff provides excellent hearing protection while fitting all MSA non slotted full-brim hats. NOTE: The addition of the Soprano muff reduces helmet rating to Class C.