Feature:1. PRESSURE RELIEVE: Flight ear plug, effectively regulate air pressure to reduce tinnitus for airplane flight or altitude change.2. NOISE REDUCTION: Dual-band ear plug, triple louvers damp loud noises and the easy-grip stem allows for easy insertion and removal.3. OPTIMAL FIT: Silicone constructed, soft and non-toxic, no itching or pressure for long time wearing on construction sites, assemblies or operate noisy machines.4. PEACE QUIET: PU foam sleeping ear plug, dense spiracle to absorb noise, comfy for sleep without foreign body sensation.5. WIDELY USE: Can be used by people who are connected with the loud noise or people who would like to sleep in silence.6. PORTABLE: Organized in a box to keep them clean and convenient carrying.Specification:Loud noise will do harm to your hearing and distract attention, this ear plugs are fitting and keep noise out to provide you a quiet world when you want sleep, work and study.Feature:PRESSURE RELIEVE: Flight ear plug, effectively regulate air pressure to reduce tinnitus for airplane flight or altitude change.NOISE REDUCTION: Dual-band ear plug, triple louvers damp loud noises and the easy-grip stem allows for easy insertion and removal.OPTIMAL FIT: Silicone constructed, soft and non-toxic, no itching or pressure for long time wearing on construction sites, assemblies or operate noisy machines.PEACE andamp QUIET: PU foam sleeping ear plug, dense spiracle to absorb noise, comfy for sleep without foreign body sensation.WIDELY USE: Can be used by people who are connected with the loud noise or people who would like to sleep in silence.PORTABLE: Organized in a box to keep them clean and convenient carrying.Specification: Material: Silicone andamp PU Style: Flight earbud or Noise reduction earplug or Foam sleeping earplug (optional)Box size: 8.2 x 3.4 x 2.2cm or 3.2 x 1.3 x 0.8in Package weight: 60g or 2.1in Package List: 4 x Pair of Earplug 1 x Storage BoxPackage List:4 x Pair of Earplug 1 x Storage Box