Atomic Strap is made of the same material as the iPod Nano, for the most seamless appearance. The soft strap rests gently on the back of your neck, bringing the ear pieces in perfect reach. Outfit your Nano in the skin that suits you and attach it to the base of the strap. Sound Design Atomic Strap shares the same ear pieces as Atomic Bass. The unique design creates the perfect acoustic chamber for deep, powerful, natural bass. Because the impedance is 32 instead of 16 , they are more efficient, so it takes less battery power to drive them. Expect natural tonality and super low end slam when you need it.