Replace worn Bose A20/A30 ear seals easily Ensure the performance and comfort level of your A20/A30 aviation headset. Use as a replacement for lost or damaged ear cushions. Cushions are identical to the original set included with new A20/A30 headsets and are made of supple, breathable protein leather. Make your Bose A20/A30 feel like new again with a fresh set of protein leather ear seals. Bose recommends replacing ear seals every 6 months or 350 hours of use. Factors that decrease the useful life of your ear cushions are: Having a full beard or heavy whiskers. Subjecting the headset to severe cold or extreme heat. Putting excess strain on the cushions due to improper storage. Indications that your ear cushions need replacing: Flaking of the outer covering. Cuts or tears. Flattening of the cushion, reducing the effectiveness of the seal. Made by Bose. Does not fit Bose Aviation X headsets. Pair.
