Bullet Points : 1 > Travel Without Pressure! 2 > Quies Special Aircraft Hearing Protectors Prevent Eardrum Pain Caused By These Pressure Changes 3 > Made Of Soft Silicone, They Contain A Ceramic Filter That Promotes A Gradual Exchange Of Air Over Several Minutes 4 > The Eardrum Gradually Adapts To The New Pressure, Without Being Shocked. This Patented Process Was Developed With The Help Of Us Navy Pilots 5 > Soft And Flexible, They Are Easy To Insert And Adapt To The Shape Of The Ear Canal Description : When Taking Off And Landing, Pressure Changes Put Our Ears To The Test. In Some Cases, They Can Even Suffer From Barotrauma. Quies Special Aircraft Hearing Protectors Prevent Pain In The Eardrum Caused By Pressure Changes. Made From Soft Silicone, They Contain A Ceramic Filter That Promotes A Gradual Air Exchange Over Several Minutes. The Eardrum Slowly Adapts To New Pressure, Without Suffering A Shock. This Patented Process Has Been Developed With The Help Of Us Navy Drivers. Soft And Flexible, They Are Easy To Insert And Adapt To The Shape Of The Ear Canal. Available In 2 Sizes (Adults And Children Over 30 Months), They Are Reusable 2 Or 3 Times