3M™ PELTOR Optime II Headset with Neckband H520A-407-GQ Features: Soft, wide ear cushions help reduce pressure around the ears and increase comfort and wearability. The large internal space of the headphones helps reduce moisture and heat buildup. Easily replaceable pads and spare parts help keep the headset hygienically clean. Headset Temporal Green SNR = 31 dB. Recommended Industries / Usage: Metalworking, Automotive, Airports, Construction, Textiles, Chemicals and Pharmaceuticals, Cement Manufacturing, Printing, Woodworking, Heavy Engineering, Foundries, Mining, and Quarries. Hazards: Noise, sound. Certifications: EN 352-1:1993 - EN Standard, CE Certified.