WORKPLACE ENHANCEMENT: The power is yours to decide what you listen to, not dictated by surrounding jackhammers OSHA COMPLIANT NOISE REDUCTION: Engineered to seal out noise and carries the EPAƒ??s NRR (Noise Reduction Rating) of 25 decibels recognized by OSHA to meet ANSI standards PATENT PENDING TECHNOLOGY: Overmolded driver completely seals out dust, debris, and moisture NOISE CANCELING MIC: Our microphone sets the bar higher when it comes to noise cancellation with best in class performance IMMERSIVE SOUND: Out with the bad and in with the good. By using biocompatible silicone earplugs, a complete and comfortable seal is formed, enabling you to capture the full range of the custom-tuned drivers