Proprietary 45 mm large-aperture drivers with rare earth magnets and copper-clad aluminum wire voice coilExceptional clarity throughout an extended frequency range, with deep, accurate bass responseCircumaural design contours around the ears for excellent sound isolation in loud environments90? swiveling earcups for easy, one-ear monitoringProfessional-grade earpad and headband material delivers more durability and comfortCollapsible for space-saving portability