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  • $79.00
  • Regular price $109.00
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Same Great Protection. Slimmer Fit.

ISOtunes Sport DEFY Slim is an ultra-comfortable electronic earmuff, featuring superior protection and environmental awareness. With active gunshot noise suppression, Bluetooth compatibility, and a background noise-dampening microphone, DEFY Slim allows you to align your sights with ease without sacrificing your safety.


Backed by:

  • One Year Warranty (if it's our fault we fix it, no questions asked)
  • 30-day Money Back (you won't need this, but just in case)
  • Friendly, US based customer service team



Tactical Sound Control™

Proprietary technology that amplifies sounds you want to hear up to 8x their natural volume, while still protecting you from harmful gunshot noises in under 2 milliseconds.

21 dB of Noise Reduction

Most gunshots register between 150 - 170 decibels, which can quickly damage your hearing. Combat those dangerous noise levels and shoot safely all day long.

Ultra-Slim Design

At just 310 g, this ultra-slim muff weighs 100g less than other leading earmuffs. Enjoy all day performance and comfort, while aligning your sights with ease.


 Full Product Details

• Tactical Sound Control™ Technology enhances your hearing by 8x while protecting you from high-impact noises in under 2 milliseconds.

• Ultra-Slim Profile

• 21 NRR tested and approved to ANSI s3. 19-1974.

• Bluetooth 5.0 connects, and dual-connects, devices 30+ feet.

• Lightweight Design at just 310 grams.

• Up to 25 Hr Battery Life with 2 AAA batteries.

• SafeMax™ Technology limits volume output to 85dB for all-day, damage-free listening.

• IPX4 Durability for sweat, water, and dust resistant protection.

• Noise-Isolating Microphone for clear communication in loud environments.


ISOtunes Sport DEFY Slim comes with 2 AAA batteries and an auxiliary cable.


Warranty & Guarantee

Warranty: All ISOtunes® Sport products come with a 1-year warranty against defects in material and workmanship. The warranty does not cover damage by misuse, abuse or unauthorized modifications. We will provide a free exchange for customers who experience defective products within 12 months of purchase.*

Guarantee: Your satisfaction is guaranteed with a 30-day money back promise. If you are not completely satisfied with your product, please contact us within 30 days of purchase and we will prove a full refund*.

*Apparel & Merchandise items are excluded from warranty & money back guarantee. Only items that have been purchased directly from can be returned. ISOtunes Sport products purchased through other retailers must be returned in accordance with their respective returns and refunds policy.