Protection from flight ear discomfort. Relieves air pressure discomfort with the exclusive CeramX filter. Reduce harsh noise. Drug free. World's no. 1 seller. Performance guaranteed. Tested by US Navy Pilots. Approved by flight attendants. Safe, comfortable, disposable. Soft, hypoallergenic latex free 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 use as directed. The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30. (Higher numbers denote greater effectiveness.) Made in USA.