Earplanes for Air Pressure Discomfort Ear Plugs * Relieves Air Pressure Discomfort and Harsh Noises. Safe, Soft, Disposable * Made of Soft Hypoallergenic Silicone. This Pack Contains One Pair of Disposable Earplanes Good For One Round-Trip Flight. Also Great For Mountain Driving * Noise Reduction Rating: 20 Decibels When Used As Directed. The Range of Noise Reduction Ratings For Existing Hearing Protectors Is Approximately 0 to 30. (Higher Numbers Denote Greater Effectiveness.)