GSW Marvin

Introducing the all-new — featuring our first-ever dual amplifier to
minimize interference for pure, uninterrupted sound. The new innovative design
intuitively adapts to your surroundings, automatically reducing unwanted noise.

Introducing the new —built to defy limits. Go further, track your progress, and receive personalized health insights, all in a durable design that withstands extreme conditions. Take on your toughest adventures with a battery that won’t quit, and push your boundaries further than ever.