3M PELTOR Earmuff Assembly M-985/37333(AAD), for Versaflo M-100 and M-300 Products, Pair, 1 EA/Case

Absolutely outstanding quality. Fit PERFECTLY on the 3M Versaflo M100/M300 helmets (I have the M307), and seal PERFECTLY around my ears! I have had three other powered respirator systems, but this is the first one with earmuffs that fit and work 100% as they should.Installation is easy and instructions are provided on the box. The earmuffs are labeled for “right” and “left” (with an X and O, respectively). The M100/M300 helmets have screw attachment holes molded in, so it is just a matter of lining up the holes and installing two included screws on each side.The earmuffs are easy to “click” into the outward (resting) or inward (sealed on ears) position. When in the outward position, the mounts also rotate back and up to put the earmuffs behind and above the helmet. They add about 9oz to the helmet weight.Comfortable and quiet, with a 24db noise reduction rating. You can’t go wrong with 3M and Peltor!