Provides an ear-conscious design for long-lasting listening comfort.Durable urethane leather construction.Soft and comfortable earpads with 40mm driver units.Deep bass sound.Comfortable headband for long wear.40Mm Long-Stroke Drivers.Ear-Conscious Design For Long-Time Comfort.It has a durable urethane leather construction..It has soft and comfortable earpads and it features 40 millimeter driver units..It provides a ear-conscious design for long-lasting listening comfort. Enjoy long-lasting comfort, stylish design and deep bass sounds with the MDR-XD100 Studio Monitor Series headphones. Experience the ear-conscious design of the MDR-XD100 Studio Monitor Series headphones. With the 40mm driver unit, these headphones will provide you with deep bass audio for a great listening experience. Enjoy stylish long-lasting comfort with these headphones. Listen in style and comfort with the MDR-XD100 Studio Monitor Series headphones.