40dB Noise Cancelling Earbuds: With 3-layer structure, the NRR can be up to 40dB, twice higher than ordinary earplugs. If you wear these high fidelity ear plugs correctly, it will reduce 40dB noise so, make sure you wear it according to manual instructions. Reusable Earplugs for Sleeping: These ear plugs for noise reduction made of high quality silicone material that provides comfort for prolonged usage. These ear plugs for concerts are suitable for all and can be reusable, just wash it in warm water and use again. Preserve High Fidelity Audio: The sleeping ear plugs do an effective job of bringing down the overall volume, reduce background noises at a comfortable level and meanwhile preserve the sound clarity and sharpness. You won't experience any muffling. Noise Reduction Ear Plugs Great for Sleeping: The shark fin on-ear design makes this ear plugs for sleeping noise cancelling very comfortable for sleeping on your side. The earplugs for concerts are very reliable, as they will not fall out of the ears. Premium Quality: The earbuds noise cancelling are made of soft silicone material which is comfortable to wear for a long time. The comfortable ear plugs for sleeping are great choice for studying, sleeping, working and concerts.