The Kask yellow SC2 muffs are the best choice in the arborist industry for protecting your hearing. These attach to the helmet with a bayonet adapter and have a universal 30mm slot. These are non-conductive and have an ANSI rating up to 24 dB.
Fits standard 30mm hearing protection slots in most professional helmets, including the KASK Super Plasma and Zenith helmets.
