Emptiness sponge quarter hard hat hearing protection Essentially Rather literally
Klein Tools 60502 Earmuffs, Full Brim Hard Hat Attachment, 26dB Noise Protection, for Construction, Manufacturing, Maintenance, Woodworking - Amazon.com
3M Hard Hat Mounted Ear Muffs, 26 dB, Peltor X4, Black X4P51E | Zoro
3M PELTOR Ear Muffs, Noise Protection, Hard Hat Attachment, NRR 31 dB, Construction, Manufacturing, Maintenance, Automotive, Woodworking, Heavy Engineering, Mining, X5P3E,Black: Safety Ear Muffs: Amazon.com: Tools & Home Improvement