Material
Easy to use. Made from 100% silicone.Non-toxic.Hygienic
Function
Small hole allows ear to breat,can be in position for long periods
Feature
Reduce pressure,noise in the ears during take-off,landing,in flight
Application
Flight,high skiing, high-speed elevator, high-speed subway
Properties
doctors recommend, health,Reusable,Fits most ear
Package
opp bag \ plastic box \ paper bag\blister