Otis Technology presents a smarter way to protect your hearing while improving your response to range commands and other communication. Soft ear buds form a seal around the outer ear canal and connect to the unique sound reduction chambers. Because sound energy travels the path of least resistance, high-intensity sounds, like gunfire, funnel into the wider sound reduction chambers and away from your narrow ear canals. The chamber dampens, refracts and cancels harmful waves to produce a safe volume across all frequencies. So you can hear important safety signals or conversations without removing the Ear Shield. Features: Eliminates stock interference Cool and comfortable No batteries required Lightweight and collapsible Adjustable to fit any shooter