Features 1、Using the heavy duty keychain earplugs carrying case, which is convenient for travel or to carry and use, you can use the ear plug with confidence 2、The carrying case uses a sturdy metal structure, waterproof gaskets, and a sturdy brass O loop. To keep hearing protection from dust and moisture 3、These silicone earplugs can relieve earaches caused by air pressure changes during takeoff and landing of airplane travel, making your flighting more enjoyable 4、The silicone earplugs are non toxic, washable and reusable, ensuring daily use. Silicone earplugs fit most ear canals, which is light, soft and comfortable 5、The earplugs will not completely block all noise, but will maintain the quality of the music, keeping the volume at a safer listening level. Therefore, it is not recommended to use them for sleeping, hunting, shooting, riding motorcycles, etc Specification Item Type: Ear Plug Aluminum Box Size: Approx. 4.2 x 2.5 x 2.5cm / 1.7 x 1.0 x 1.0in Filter: Approx. 0.8 x 2.5cm / 0.3 x 1.0in Earplugs: Approx. 2.5 x 1.5cm / 1.0 x 0.6in Material: Aluminum, Silicone Application Scope: DJ, Bar, Rock, Party, Concert, Flying and Other Activities Earplug Noise Reduction（SNR）: 27 DB Filter SNR: 27DB NNR:25DB Efficacy: Hearing Protection Package List 1 x Aluminum Box2 x Ear Plug  2 x Filter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store