• NRR 21dB (Low), NRR 25 dB (Medium), NRR 28 dB (High)
• Patent-pending headband design based upon anatomical studies
• Dedicated right and left ear cups are designed to fit your ears and are shaped differently from front to back
• Adjustable ear cups
• Tested to ANSI S3.19-1974
• Three NRR noise protection levels from 21 dB to 28 dB