The ergonomically designed earplugs that fit the shape of the concha cavity of the human ear are tightly worn and can't be shaken off, allowing you to have a noise reduction experience closer to the laboratory effect. Matched with rhino horn in-ear nano silicone earplugs, it is not painful to wear all day, and it also brings additional passive noise reduction effect through physical sound insulation. Three-layer sound insulation, umbrella-like fit: warm touch silicone, thickness only 0.4mm, fits the inner ear, three-layer noise reduction sheet design, effective noise reduction 40dB. 30 oblique into the ear to wear firmly, soft earmuffs can be worn for a long time. The integrated design of rhino horn +30 degrees obliquely into the ears forms a triangular stable support with the ears. Even if you sleep on your side, it will still be close to your ears, and you will not gurgle. Sleeping earplugs can be washed easily without deformation. Anytime you think that they are getting dirty just wash them and your earplugs will be again in new condition and ready to use.