Ⅰ. Loop earplugs, noise-canceling earplugs for sleeping, concerts, airplanes and noise-sensitive people Ⅱ. Protect your ears: High-precision reusable earplugs reduce harmful decibel levels to protect your ears in noisy places without compromising sound quality. They are reusable, washable and durable, making them a sustainable solution to disposable earplugs. Ⅲ. Optimal comfort: The earplugs are reusable and durable ear protectors made of soft silicone. They reduce most of the noise and help you get into the bubble. Ⅳ. Easy to use: These earplugs are easy to insert and do not protrude from your ears when used properly. They come in 3 sizes, if your ears hurt, it is better to choose a smaller size. If the earplugs do not reduce the sound enough or fall out, it is better to try a larger size. Note: The three-layer earplugs are only available in one size. Ⅴ. Wide application: These are universal earplugs that provide protection against loud noise and background noise in most cases. They are great for sleeping and can help you concentrate while studying, working or reading. And of course, they are a must-have when traveling or on the go. Ⅵ. Easy to carry: Comes with a portable hard case for travel. This is an unforgettable musical gift for concertgoers and those with sensitive hearing who need to reduce the volume.