3M Peltor Optime 101 Behind-the-Head Earmuffs — H7B, NRR 27 ST2033-L Yes — ammonia is what

Yes — ammonia is what the N75004L is built for

If your shop or garage also has a chemical splash hazard from stored solvents or cleaners

The 3M 2291 is a P100 particulate filter

the TICONN-1735 lists a waterproof feature

3M Peltor Optime 101 Behind-the-Head Earmuffs — H7B, NRR 27 ST2033-L Yes — ammonia is whatEDITORIAL REVIEW: 4. 6 5 WC Safety Review of the 3M Peltor Optime 101 H7B, a behind the head NRR 26 muff for headgear compatibility. 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 Optime 101 H7B is a passive behind the head (neckband) earmuff rated NRR 26 to ANSI S3. 19, designed so the band sits at the back of the neck and clears a