The perfect closed back headphones for professional engineers, musicians and audiophiles, alike, Shure's SRH1540 headphones deliver performance, comfort, and durability. The SRH1540 Premium closed back headphones are made out of aircraft grade aluminum alloy and carbon fibre, making them lightweight and durable, their 40mm Neodymium drivers, Alcantara® ear pads and closed back design help ensure they deliver a stylish headphone design, superior acoustic performance, with a high level of passive noise isolation meaning you will hear more detail even at low volumes.