This protein faux leather Ear Cushions Ear Seals Ear Pads Compatible with David Clark、Pilot USA、SkyLite、Flightcom、Rugged、Faro、ASA etc Specially formulated foam adds comfort and ensures an appropriate seal around ears Easy to replace securely on earcups; no glue required Changing cushions recommended every six months or every 350 hours of flight Super soft plush seal provides extra comfort during very long work hours.