3M Occupational Health & Environmental Safety Hearing Conservation Earmuffs - Made using plastic stainless steel and foam3M Occupational Health & Environmental Safety Hearing Conservation Earmuffs feature soft earmuff cushions to provide comfort. They offer hearing protection by minimizing noise levels of up to 30 db. Color & matrl: Black Green Plastic Foam & Stainless Steel. Type: Earmuffs. Application/Usage: Grinding Machine Operations Painting Welding & Multiple Use. Noise Reduction: 30 dB. Size: Universal. Features: Padded Steel Headband with Four Point Suspension for Extra Comfort. Sold as 1 Each.