40dB Noise Reduction With 3layer structure, the NRR can be up to 40dB, which is twice higher than ordinary earplugs. It is ideal for studying, sleeping, working, concerts and general hearing protection in noisy environments. Preserve HighFidelity Audio: This earplug effectively reduces the overall volume, blocking background noise at a comfortable level while maintaining sound clarity and clarity. Reasonable Design: This sleeping earplug adopts finshaped design to prevent falling, 160degree angle is earfriendly, and you will not feel uncomfortable when wearing it while sleeping, even suitable for side sleepers or people who tend to turn over when sleeping. Environmentally friendly material: The comfortable noise reduction earplugs are made of nontoxic soft silicone material, which is environmentally friendly, transparent, and can be worn for a long time. Wide range of uses: sleeping, snoring, studying, bathing, traveling, loud activities, concerts, flight discomfort, motorcycles, etc. Suitable for people of all ages to prevent high noise, also washable and reusable