Comfortable Design and Reusable---Made of German high quality silicone material that provides comfort from prolonged usage. Its suitable for all kinds of people. In addition, it can be reusable, just wash it in the warm water and then it can be used again for many times. Preserve High Fidelity Audio---This 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. You will be able to hear different sound frequencies without having to worry of muffling. Great for Sleeping---The shark fin on-ear design makes it very comfortable for sleeping on your side. This earplug is very reliable, as they will not fall out of the ears. Environmentally Friendly Material---Comfortable Noise Cancelling earplugs are made of non-toxic, soft silicone material which is environmentally friendly, transparent and comfortable to wear for a long time. Any other questions, let us know. Kindly please put it to the correct ear, then it can reduce noise effectively