Ear Muffs, Earmuff Style Hard Hat-Mounted, Noise Reduction Rating 23 dB, Dielectric No, Cushion Material Foam, Liquid, For Use With Hard Hats, Cup Color Black/Orange, Series H31 Hi-Viz, Specialty, Standards CSA Class AL, Cup Material ABS, Features Earcup Pivot Points, Liquid/Foam Filled Earmuff Cushions, Weight 0.5 lb, Electrically Insulated No