ISOtunes Sport Defy Slim Basic Ear Defenders are lightweight ear muff-style ear defenders with 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 weigh 100g less than the industry standard. Although the Defy Slim Basics are not equipped with Bluetooth, they can still play music, podcasts and take phone calls via a cable between the ear defenders and phone. The Defy Slim ear defenders provide a noise reducing rating of 20 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 Memory foam ear cushions with adjustable headband for all-day comfort Up to 300 hours of Tactical Sound Control with two AA batteries 8x hearing amplification