Luxury spec replacement earpads (1 pair of LR) for PHONON 4000/4400 headphones. The surface is made of high-grade protein leather for comfort, while the interior is made of polyurethane leather to reduce bass reverberation. Even though the polyurethane provides a low-resilience fit, the large gussets are designed to maintain a certain amount of side pressure. The design provides a more comfortable music playback environment for monitoring during DJing and in the city.