SUPERIOR COMFORT - Made of lightweight, soft silicone material, fits your ears perfectly, providing an extremely comfortable wearing experience. Comes with 4 ear tip sizes, choose the best fit according to your ear canal. NOISE REDUCTION - OPEIIN can effectively reduce external noise, achieving a maximum noise reduction effect of 28dB. Helping you to concentrate better, get quality sleep or enjoy a quiet travel time. HEARING PROTECTION - OPEIIN's design incorporates cutting-edge acoustic engineering technology to minimize the damage to hearing caused by ambient noise by optimizing the structure and materials of the earplugs. REUSABLE - OPEIIN is easy to clean and durable. Compared with disposable earplugs, OPEIIN is environmentally friendly and economical, providing long-term use value. In addition, OPEIIN earplugs have excellent waterproof performance and adapt to the use needs of various environments. EASY TO USE - The ergonomic design makes it very simple and comfortable to wear. Whether it is the first time or long-term wear, you can easily insert the earplugs into the ear canal and ensure a tight fit. When properly inserted, the OPEIIN earplugs will not stick out.