Thank you very much for viewing. 15 pairs included 36dB noise reduction N's unique dual-layer soundproof design ■ Comfortable fit 3 cases included Convenient to carry Designed to fit the Japanese ear canal Soundproof layer Many pores can attenuate sound waves Reduces sound by approximately 36dB Protective layer Uses low-rebound material, takes 90 seconds to restore after being crushed Does not put a strain on the ears Ventilation layer 0.1km pore diameter ensures good breathability Soundproof layer Unique dual-layer soundproofing Cuts noise effectively Contact layer Soft and does not hurt the ears Earplugs are made of materials that are susceptible to water and sebum, so please clean the inside of your ear canal before inserting the earplugs. If there is any moisture remaining in your ears, please absorb the moisture with a cotton swab. Replace with a new one every month.