I bought these for long flights, but I never used them and have kept them in storage. They are new and unused. 【Easy to Wear】: Includes ear tips in 4 sizes (XS to L), so you can adjust them to fit your ear size and effectively block out sound. Simply insert the earplugs into your ear canal for easy wear. Choose the most comfortable size (XS, S, M, L) for the best fit. (Note: The earplugs come with M-sized ear tips attached.) 【Excellent Noise Reduction Design】: The dual-layer noise reduction design effectively reduces everyday noises like snoring and talking (noise reduction level: -36dB). It reduces surrounding noise when studying, working, sleeping, or traveling on buses or airplanes, protecting your hearing. 【Safe and Clean Earplugs】: Because the earplugs come into contact with your skin, you can wash the entire body with water to keep them clean. Plus, they are reusable, making them environmentally friendly and easy on your wallet. They come with a dedicated case for clean storage and easy transport for travel and business trips. 【Comfortable Fit】: Made of soft, skin-friendly silicone material that can be freely shaped, the biggest feature is that they "can be adjusted to fit your ears." Unlike disposable sponge-type earplugs, they are less likely to cause pressure or pain due to urethane expansion, making them recommended for sleep and long-term use. 【Useful for Noise Reduction】: These earplugs are essential for reducing noise during sleep (snoring, construction, etc.) and for concentrating on work. They support deep and comfortable sleep for those suffering from sleep disorders, hyperacusis, or hearing impairments, and for those who have light sleep at night. They are also ideal for when you want to escape everyday noises and concentrate on work, study, or reading.