Revolutionary Round Shape: Sleep headphones are ergonomically shaped in their natural shape to match the ear canal for optimal, quiet comfort at night. Available in 3 different sizes (S -L). If the sound insulation effect of the earphones is not good or it falls off, it is better to try a larger earplug. Suitable for a variety of sleeping positions : not easy to fall while sleeping. After being heated by body temperature, the earplugs fit the shape of the ear perfectly. The noise shield is perfect, blocking out unwanted sound waves like a shield. No need to insert earplugs into the ear canal, no harm to the inner ear VERSATILE AND EASY TO CLEAN: Earplugs for sleeping provide comfort, unlike plugs low grade silicone earplugs, to foam or styling wax earplugs, they are washable and reusable as they are not disposable earplugs, saving you a lot of money /p> Versatile earplugs: ideal for light sleepers and people sensitive to noise. Can effectively isolate sound, car sound, motorcycle sound, construction sound, and prevent tinnitus. In many cases, it provides noise blocking and background noise protection, which can help you focus on studying, working or reading.