The Shure SRH240A headphones are freshly updated with your comfort in mind! A re-engineered headband and earcup assembly give you a more ergonomic fit for enhanced comfort and a broader range of motion. The SRH240As feature a closed-back design, so they help block out external noise - great for listening to music on your iPod, but even better when it's time to record in your studio. No more problems with your headphone mix bleeding into your live microphones! Plus, the wide frequency range means you're going to hear the lowest lows and the highest highs from your Shure SRH240 headphones.