ISOtunes Sport Defy Slim Ear Defenders are lightweight ear muff-style ear defenders with Bluetooth connectivity and ISOtunes' innovative Tactical Hearing Protection for all-round hearing safety when in high impact noise environments. Protect your hearing with these comfortable ear defenders that feature an ultra-slim design for weight reduction and all-day comfort. The Defy Slim Ear Defenders are equipped with Bluetooth, so can play music, podcasts and take calls with out the need for a wired connection between the ear defenders and phone. The Defy Slim ear defenders provide a noise reduction rating of 21 decibels with a noise isolating response time of less than 2 milliseconds, making them an essential part of your shooting kit this season. Available in Green and in One Size Lightweight design ideal for field sports Ultra-slim design for comfort Microphone blocks out steady-state noise for clear calls in loud environments Memory foam ear cushions with adjustable headband for all-day comfort Up to 25 hours of battery life 8x hearing amplification Less than 2 millisecond response time