Maximizing your personal audio experience has never been easier than with SONY ZX-Series headphones. Built with comfort and performance in mind, there's no need to compromise. Lightweight 1.38 in neodymium dynamic drivers deliver a punchy, rhythmic response to even the most demanding tracks. The swiveling earcup design allows easy storage when you're not using them and enhances portability when you're traveling. The earcups swivel flat, so you can pack them into a suitcase or bag without worrying about taking up too much valuable space. These headphones have a self-adjusting headband and soft cushioned earcups that cover the whole ear.