Replace damaged or lost ear cushions on the Bose Aviation Headset XÂ® with the Aviation Headset XÂ® replacement ear cushions. These cushions are identical to the originals supplied with the headset and are constructed with soft, breathable protein leather. Specially formulated foam for improved comfort and a better seal. No gluing required for easy replacement. Ear cushions are recommended to be replaced every six months or every 350 hours.