Blox Plane Earplugs are ear protections, especially designed to be worn in a plane, because they are anti-pressure.<br /><br />In a plane, the pressure difference between inside and outside of the plane can be painful at the level of the ear. Blox Plane Earplugs reduce and regulate the pressure of air during changes of altitude.<br /><br />2 sizes: Adult and child (from 4 years-old). Boxes of 1 pair.