3M Peltor Optime is versatile, over-the-head earmuffs featuring a stainless steel headband for consistent force and effective hearing protection for noise levels up to 98 dBA. Color-coding for compliance sighting. Color: yellow. Hearing protection style: over the head. Material: ABS. Noise reduction rating: 26 decibel. Product type: earmuffs. Recommended application: chipping, chiseling, drilling, furnace operations, grinding, heavy equipment operations, machining, pouring/casting, power fastening, riviting, sanding, sawing, welding. Recommended industry: agriculture, automotive, chemicals, general manufacturing, healthcare, oil and gas, pharmaceuticals, primary metals. Size: one size fits most. For noise levels up to 95 dBA. Stainless steel construction resists bending and warping. Earcup pivot points tilt for optimum comfort and efficiency. Ultra light with liquid/foam filled earmuff cushions. Noise reduction rating (NRR): 26 dB CSA Class A.