Product Details Designed for side sleepers This earplug features an ultra-compact and thin body design. If you like this earplug for sleeping and don't want a foreign body sensation in your ears when you sleep on your side, then this thin sleeping earplug is your best choice. It won't squeeze your ears when you sleep on your side, and the L-shaped skin-friendly rubber earplug sleeve allows the earphones to fit your ears all night long. No sense of wearing This is the lightest earplug, each sleeping earplug weighs only 0.07 ounces. It is light and natural to wear, and you can hardly feel its existence. Dual-layer technology The acoustic noise technology makes calls sound louder, just like noise. Keep you away from ambient noise. 72-hour ultra-long battery life The sleeping earplugs can be used for 3-4 hours at a time, and the stylish charging box can extend the use time to 72 hours, which means the sleeping earplug charging box can be charged 8 times extra. High-quality sound effect This sleeping earplug brings you high-quality hearing enjoyment. The whale cavity panoramic surround sound effect allows you to immerse yourself in music. It is a perfect sleeping companion.