Safe and Convenient The noise reduction earplugs are made of high quality sponge material, it is a self-adjusting thermal sponge that will bounce after entering the ear canal and automatically adjust to the ear canal when the temperature is softer and not compressing. Ear canal at night, offer a smooth and comfortable wearing experience.<br>Effective Noise Cancellation Foam eartip cone design to fit different sizes of ear canal, it can block out loud noises to protect your ears, avoid distractions while sleeping, and help you study.<br>Widely Used Earplugs that are small but strong enough to protect your hearing in noisy environments. They can block all kinds of noise easily, you can use them while sleeping, traveling, concerts, building, working, studying, snoring, office and other places where you need to be quiet. even if you wear them for a long time without causing skin irritation or discomfort.