3M Peltor Optime 98 Series Earmuffs• Slim tapered upper dome, excellent for use with hard hat and face protection equipment • Broad foam cushions give low, comfortable surface pressure.  • Pressure equalization air openings, quickly ensure the correct pressure to the eardrum • Suitable for factories, sheet metal works, schools, printing offices, industries and power equipment • CSA Class A • Colour: YellowAvailable in Headband and Cap Mount models