Moldex 6680 Soothers Cordless Earplugs — NRR 33 oil mist The listing states fluorescent yellow lime When a hard hat The listing states fluorescent yellow lime (yellow green) background material North 5500 series Half mask Yes — bayonet North 7700 series Half mask Yes — bayonet North 7600 series Full face Yes — bayonet North 5400 series Full face Yes — bayonet 3M MSA Half full No (not bayonet compatible) N75004L vs Other North Cartridges for the trade offs see foam vs reusable ear plugs plants and construction work at sustained high noise suit a low profile uncorded NRR 33 plug that won’t snag in tight spaces