Thank you for viewing! [Supervised by a Sleep Expert] Supervised by a sleep consultant and physical therapist with expertise in the body and sleep. Effectively reduces noise and can be used not only for everyday sleep but also while traveling. [Effectively Reduces Noise] Adopting a unique ergonomic shape, it can reduce noise by up to 30dB. Furthermore, the angle is designed to be comfortable even when tossing and turning, improving the wearing comfort. (*This is not complete soundproofing.) [For Various Situations] Developed for sleep, but can be used in various situations. It can be used for sports such as walking and running, in loud environments such as live music events, and when you want to concentrate on work or study. [Includes a Storage Case] Comes with a small storage case. It's pocket-sized and highly portable. [Size] Main body: 2.5 x 1.5cm Storage case: 3.5 x 3.5cm [Set Contents] Earplugs x 1 set (for both ears) Storage case x 1 [Color] Black Thank you!