Method of use : rub the earplugs into a long strip. The more thin, the easier to wear.
Plug in : pull the upper ear Angle and plug two-thirds of the earplug into the ear canal.
Press and hold : hold the earplug for about 20 seconds until the earplug expands and blocks the ear canal.
Pull out : when the earplug is removed after use, gently rotate the earplug out.