This earmuff for hard hats features lightweight earcups that attach to a variety of hard hats without additional adapters. The multi-position ear cups are beveled to fit comfortably under the hard hat. Ear cups flip up and lock in place when not in use. Contoured ear cushion for improved fit and comfort. Soft sealing cushions and molded foam ear cup inserts are easily replaceable. Tested to ANSI S3.19-1974. NRR 23 dB.**The NRR may overestimate the protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided.
