when travelling by aircraft your ears are often subject to large pressure differences. this can feel like an annoying pressure in the ears & sometimes can be painful. pluggerz travel have a unique filter & ensures that pressure in your ear is reduced. take off & landings become more comfortable. pluggerz travel also filter annoying noise making travel by plane or travelling through the mountains enjoyable., special kids version for small ears, age indication 4 to 14 years old, maximum user comfort thanks to 3 lamina & anti-allergic silicon material, for frequent use, unique pressure-regulating filter, including handy pouch