Free items given out on planes have been reported as highly unhygienic. Most notably, headphones, whose foam ear cups are hardly ever changed unless torn. Single-use earphones provide a solution to this problem but contribute toward a larger one surrounding sustainability. Dampen headphones use replaceable water-soluble padding to provide an alternative solution to existing in-flight headphones, battling e-waste and reducing the spread of harmful bacteria. The headphones’ modular design allows individual parts to be replaced or repaired instead of disposed of, further reducing the amount of waste produced by the airline industry.