When you need to be seen as much as you need to protect your hearing choose Leightning® double-duty muffs. Patented Air Flow Control™ technology ensures excellent, full-frequency noise attenuation. Hi-Visibility, high-contrast, bright-green cans help you be seen at night, in low light and under inclement weather conditions. Soft, snap-in ear cushions provide wearing comfort while simplifying replacement. Telescopic, lock-in-place muff-height adjustability allows you to tailor your protection to fit. L3HV: with reflective headband. Material(s): Metal/Plastic; Ear Cushion Material: Foam; Noise Reduction Rate (NRR): 30.