Description About this item 30mm Neodymium Drivers – The 30mm driver units coupled with ferrite magnets are designed to accurately reproduce a broad, dynamic frequency range, resulting in smooth transitions in treble and mid-range frequencies with ample bass response Pressure-Relieving Earpads – The adjustable headband with swivel ear pads is designed for comfort so you can enjoy extended listening sessions without fatigue Folding design for easy portability – The collapsible construction and swivel earcups make it easy to stow the headphones in a backpack or bag for travel Swivel Earcups – The swivel and folding-style earcups stow away for compact portability