Take-Off And Landing, the changes in pressure puts a great ears to the test. In some cases, they can even be barotraumatisme. The Carry-On hearing protection Quies prevent pain in the Tympan caused by these changes in pressure. Soft silicone, they contain a ceramic filter which promotes a gradual exchange of air on for several minutes. Fits over the eardrum with the new pressure, without being shock. This patented process has been developed with the help of the pilots of the US Navy. Soft and supple, they are easy to insert and adapt to the shape of the ear canal. Available in 2 sizes (adults and children above the age of 30 months), they can be reused 2 or 3 times.