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 \u0026 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. 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 & 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  & PU Style: Flight earbud / Noise reduction earplug / Foam sleeping earplug (optional) Box size: 8.2 * 3.4 * 2.2cm / 3.2 * 1.3 * 0.8in Package weight: 60g / 2.1in Package List: 5 * Pair of Earplug 1 * Storage Box 5 * Pair of Earplug 1 * Storage Box